diff --git a/e2e/config/matrix.yml b/e2e/config/matrix.yml
index c342e7d8d..edcc7605b 100644
--- a/e2e/config/matrix.yml
+++ b/e2e/config/matrix.yml
@@ -10,10 +10,6 @@ tags:
   exclude:
     - flaky
     - wip
-    # The remaining `full` tests place a real order and live under tests/react-native/,
-    # so they cannot run on the Swift and Kotlin rows. Drop this entry when the shared
-    # ordering tests replace them.
-    - full
 applications:
   - id: react-native-ios
     target: react-native
diff --git a/e2e/flows/checkout/assert-complete.yaml b/e2e/flows/checkout/assert-complete.yaml
index 3269468a0..b91f2028b 100644
--- a/e2e/flows/checkout/assert-complete.yaml
+++ b/e2e/flows/checkout/assert-complete.yaml
@@ -1,5 +1,7 @@
 appId: ${E2E_APP_ID}
 ---
+# The payment provider and the order creation both run before the page changes, so this
+# wait covers two remote systems rather than a render.
 - extendedWaitUntil:
     visible: "${POST_SUBMIT_RESULT_PATTERN}"
-    timeout: 10000
+    timeout: 60000
diff --git a/e2e/flows/checkout/assert-returned-to-empty-cart.yaml b/e2e/flows/checkout/assert-returned-to-empty-cart.yaml
index 34ef280a4..c5005b9ea 100644
--- a/e2e/flows/checkout/assert-returned-to-empty-cart.yaml
+++ b/e2e/flows/checkout/assert-returned-to-empty-cart.yaml
@@ -2,10 +2,14 @@ appId: ${E2E_APP_ID}
 ---
 - runFlow: close.yaml
 
+# The four samples return to four different screens after checkout closes, so the flow
+# asserts nothing about which screen that is. The cart control belongs to the app chrome
+# and stays on screen everywhere, which makes it both the "we are back" signal and the
+# way to the cart.
 - extendedWaitUntil:
     visible:
-      id: catalog-tab
-    timeout: 10000
+      id: cart-tab
+    timeout: 30000
 
 - tapOn:
     id: cart-tab
diff --git a/e2e/flows/checkout/dismiss-active-field.yaml b/e2e/flows/checkout/dismiss-active-field.yaml
index 9407fd75d..40b8c6f90 100644
--- a/e2e/flows/checkout/dismiss-active-field.yaml
+++ b/e2e/flows/checkout/dismiss-active-field.yaml
@@ -5,6 +5,15 @@ appId: ${E2E_APP_ID}
       platform: android
     commands:
       - hideKeyboard
+# iOS keeps the keyboard above the page until the accessory bar closes it. The next field
+# then stays behind the keyboard, and the tap that follows lands on a key instead.
+- runFlow:
+    when:
+      platform: ios
+      visible: "Done"
+    commands:
+      - tapOn: "Done"
+      - waitForAnimationToEnd
 - runFlow:
     when:
       platform: ios
diff --git a/e2e/flows/checkout/fill-billing-address.yaml b/e2e/flows/checkout/fill-billing-address.yaml
new file mode 100644
index 000000000..8e7ffc9a9
--- /dev/null
+++ b/e2e/flows/checkout/fill-billing-address.yaml
@@ -0,0 +1,43 @@
+appId: ${E2E_APP_ID}
+---
+# Checkout offers a "use the shipping address" control only when it can copy the address
+# the cart supplied. The samples build their carts through different mutations, so one
+# target gets the control and another gets an empty billing form. The scroll below stops
+# at whichever the target shows, and the branch fills the form only when there is one.
+- scrollUntilVisible:
+    element:
+      text: "^(Billing address|Use shipping address as billing address)$"
+    direction: DOWN
+    centerElement: true
+- runFlow:
+    when:
+      visible: "^Billing address$"
+    commands:
+      # Country/Region and Province already hold the shop defaults, so this flow leaves
+      # them alone and supplies an address that suits those defaults.
+      - scrollUntilVisible:
+          element:
+            text: "^First name( \\(optional\\))?$"
+          direction: DOWN
+          centerElement: true
+      - tapOn:
+          text: "^First name( \\(optional\\))?$"
+      - inputText: "${BILLING_FIRST_NAME}"
+      - runFlow: dismiss-active-field.yaml
+      - tapOn:
+          text: "^Last name$"
+      - inputText: "${BILLING_LAST_NAME}"
+      - runFlow: dismiss-active-field.yaml
+      - tapOn:
+          text: "^Address$"
+      - inputText: "${BILLING_ADDRESS_LINE1}"
+      - runFlow: dismiss-active-field.yaml
+      - tapOn:
+          text: "^City$"
+      - inputText: "${BILLING_CITY}"
+      - runFlow: dismiss-active-field.yaml
+      - tapOn:
+          text: "^Postal code$"
+      - inputText: "${BILLING_POSTAL_CODE}"
+      - runFlow: dismiss-active-field.yaml
+      - waitForAnimationToEnd
diff --git a/e2e/flows/checkout/fill-payment-card.yaml b/e2e/flows/checkout/fill-payment-card.yaml
index bee1b29f8..0504c8515 100644
--- a/e2e/flows/checkout/fill-payment-card.yaml
+++ b/e2e/flows/checkout/fill-payment-card.yaml
@@ -9,8 +9,9 @@ appId: ${E2E_APP_ID}
     text: "^Card number$"
 - waitForAnimationToEnd
 - inputText: "${CARD_NUMBER}"
+# Checkout groups the digits, so the field never reads back the value the test typed.
 - extendedWaitUntil:
-    visible: "^${CARD_NUMBER}$"
+    visible: "^${CARD_NUMBER_DISPLAY}$"
 - runFlow: dismiss-active-field.yaml
 - scrollUntilVisible:
     element:
@@ -31,4 +32,10 @@ appId: ${E2E_APP_ID}
 - waitForAnimationToEnd
 - inputText: "${CARD_SECURITY_CODE}"
 - runFlow: dismiss-active-field.yaml
+- tapOn:
+    text: "^Name on card$"
+- waitForAnimationToEnd
+- eraseText
+- inputText: "${CARD_HOLDER_NAME}"
+- runFlow: dismiss-active-field.yaml
 - waitForAnimationToEnd
diff --git a/e2e/flows/checkout/submit.yaml b/e2e/flows/checkout/submit.yaml
index 56e90d6b1..0b1472453 100644
--- a/e2e/flows/checkout/submit.yaml
+++ b/e2e/flows/checkout/submit.yaml
@@ -1,10 +1,32 @@
 appId: ${E2E_APP_ID}
 ---
+# The keyboard from the last payment field can still cover the foot of the page, so the
+# control has to reach the middle of the screen before the tap. `centerElement` does that.
+# A `visibilityPercentage` below 100 rounds down to zero, which lets the scroll stop early,
+# and a tap that lands on the keyboard does nothing while Maestro still reports it as done.
 - scrollUntilVisible:
     element:
-      text: "^(Pay now|Complete order)$"
+      text: "^(Pay now|Complete order|Review order)$"
     direction: DOWN
-    visibilityPercentage: 90
+    centerElement: true
+
+# A shop that shows shipping options keeps the pay action behind a review step. One button
+# carries both labels, so the review tap comes first and the pay tap follows it.
+- runFlow:
+    when:
+      visible: "^Review order$"
+    commands:
+      - tapOn:
+          text: "^Review order$"
+          enabled: true
+      - extendedWaitUntil:
+          visible: "^(Pay now|Complete order)$"
+          timeout: 30000
+      - scrollUntilVisible:
+          element:
+            text: "^(Pay now|Complete order)$"
+          direction: DOWN
+          centerElement: true
 - tapOn:
     text: "^(Pay now|Complete order)$"
     enabled: true
diff --git a/e2e/test/checkout_payment_fixture_test.rb b/e2e/test/checkout_payment_fixture_test.rb
new file mode 100644
index 000000000..63f30f751
--- /dev/null
+++ b/e2e/test/checkout_payment_fixture_test.rb
@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+require "minitest/autorun"
+require "yaml"
+
+class CheckoutPaymentFixtureTest < Minitest::Test
+  E2E_ROOT = File.expand_path("..", __dir__)
+  CHECKOUT_PATH = File.join(E2E_ROOT, "tests", "shared", "checkout-hardcoded-buyer-identity.yaml")
+  PAYMENT_FLOW_PATH = File.join(E2E_ROOT, "flows", "checkout", "fill-payment-card.yaml")
+
+  def yaml_documents(path)
+    File.read(path).split(/^---\s*$/).map { |document| YAML.safe_load(document) }
+  end
+
+  def test_successful_checkout_uses_the_bogus_gateway_approval_number
+    checkout = yaml_documents(CHECKOUT_PATH).first
+
+    assert_equal "1", checkout.fetch("env").fetch("CARD_NUMBER")
+    assert_equal "1", checkout.fetch("env").fetch("CARD_NUMBER_DISPLAY")
+  end
+
+  def test_payment_flow_replaces_the_prefilled_cardholder_name
+    commands = yaml_documents(PAYMENT_FLOW_PATH).last
+    name_field_index = commands.index { |command| command.is_a?(Hash) && command.dig("tapOn", "text") == "^Name on card$" }
+    erase_index = commands.index("eraseText")
+    cardholder_name_index = commands.index { |command| command == {"inputText" => "${CARD_HOLDER_NAME}"} }
+
+    assert_equal name_field_index + 2, erase_index
+    assert_equal erase_index + 1, cardholder_name_index
+  end
+end
diff --git a/e2e/test/e2e_matrix_to_browserstack_run_plan_test.rb b/e2e/test/e2e_matrix_to_browserstack_run_plan_test.rb
index 99228a2b8..1c928cbe5 100644
--- a/e2e/test/e2e_matrix_to_browserstack_run_plan_test.rb
+++ b/e2e/test/e2e_matrix_to_browserstack_run_plan_test.rb
@@ -48,8 +48,8 @@ def test_runs_carry_default_tags_and_the_other_platform_exclusion
     android_run = run_for("kotlin-android")
 
     assert_equal ["launch", "checkout"], ios_run.fetch("include_tags")
-    assert_equal ["flaky", "wip", "full", "android-only"], ios_run.fetch("exclude_tags")
-    assert_equal ["flaky", "wip", "full", "ios-only"], android_run.fetch("exclude_tags")
+    assert_equal ["flaky", "wip", "android-only"], ios_run.fetch("exclude_tags")
+    assert_equal ["flaky", "wip", "ios-only"], android_run.fetch("exclude_tags")
   end
 
   def test_an_application_overrides_the_default_tags
diff --git a/e2e/tests/react-native/checkout-guest.yaml b/e2e/tests/react-native/checkout-guest.yaml
index d98b3e055..958dfcafc 100644
--- a/e2e/tests/react-native/checkout-guest.yaml
+++ b/e2e/tests/react-native/checkout-guest.yaml
@@ -3,6 +3,9 @@ name: React Native checkout - guest
 tags:
   - checkout
   - full
+  # Only React Native runs this today, and every row now runs the whole tests folder.
+  # The shared guest test replaces this file, and this tag goes with it.
+  - wip
 
 env:
   # Sample app buyer identity configuration
diff --git a/e2e/tests/react-native/checkout-hardcoded-buyer-identity.yaml b/e2e/tests/react-native/checkout-hardcoded-buyer-identity.yaml
deleted file mode 100644
index 47215670e..000000000
--- a/e2e/tests/react-native/checkout-hardcoded-buyer-identity.yaml
+++ /dev/null
@@ -1,24 +0,0 @@
-appId: ${E2E_APP_ID}
-name: React Native checkout - hardcoded buyer identity
-tags:
-  - checkout
-  # This test submits a real order, so it belongs to the expensive tier.
-  - full
-
-env:
-  # Sample app buyer identity configuration
-  E2E_CART_PARAMS: "productIndex=0&quantity=1&buyerIdentityMode=hardcoded"
-
-  # Checkout payment fixture
-  CARD_NUMBER: "1"
-  CARD_SECURITY_CODE: "123"
-
-  # Accepted successful checkout states for this smoke test.
-  POST_SUBMIT_RESULT_PATTERN: ".*(Thank you|Your order|Order confirmed|confirmation).*"
----
-- runFlow: ../../flows/app/bootstrap-cart-from-link.yaml
-- runFlow: ../../flows/checkout/present.yaml
-- runFlow: ../../flows/checkout/fill-payment-card.yaml
-- runFlow: ../../flows/checkout/submit.yaml
-- runFlow: ../../flows/checkout/assert-complete.yaml
-- runFlow: ../../flows/checkout/assert-returned-to-empty-cart.yaml
diff --git a/e2e/tests/shared/checkout-hardcoded-buyer-identity.yaml b/e2e/tests/shared/checkout-hardcoded-buyer-identity.yaml
new file mode 100644
index 000000000..fb4719ace
--- /dev/null
+++ b/e2e/tests/shared/checkout-hardcoded-buyer-identity.yaml
@@ -0,0 +1,39 @@
+appId: ${E2E_APP_ID}
+name: Checkout with hardcoded buyer identity
+tags:
+  - checkout
+  # This test submits a real order, so it belongs to the expensive tier.
+  - full
+
+env:
+  # The cart carries the contact and the delivery address, so checkout asks for payment
+  # only. That makes this the shortest real order, and the first one to fix when checkout
+  # breaks.
+  E2E_CART_PARAMS: "productIndex=0&quantity=1&buyerIdentityMode=hardcoded"
+
+  # Checkout payment fixture. The shop runs the bogus gateway, which rejects real card
+  # brands and reads a single digit instead: 1 approves, 2 declines, 3 fails the gateway.
+  CARD_NUMBER: "1"
+  CARD_NUMBER_DISPLAY: "1"
+  CARD_SECURITY_CODE: "123"
+  CARD_HOLDER_NAME: "Maestro Shopify"
+
+  # Checkout billing fixture. The cart supplies a one-time delivery address, which the
+  # billing section cannot copy, so the test types a billing address of its own. Country
+  # and province keep the shop defaults, so this address stays in Canada.
+  BILLING_FIRST_NAME: "Maestro"
+  BILLING_LAST_NAME: "Shopify"
+  BILLING_ADDRESS_LINE1: "620 King Street West"
+  BILLING_CITY: "Toronto"
+  BILLING_POSTAL_CODE: "M5V 1M7"
+
+  # Accepted successful checkout states for this smoke test.
+  POST_SUBMIT_RESULT_PATTERN: ".*(Thank you|Your order|Order confirmed|confirmation).*"
+---
+- runFlow: ../../flows/app/bootstrap-cart-from-link.yaml
+- runFlow: ../../flows/checkout/present.yaml
+- runFlow: ../../flows/checkout/fill-payment-card.yaml
+- runFlow: ../../flows/checkout/fill-billing-address.yaml
+- runFlow: ../../flows/checkout/submit.yaml
+- runFlow: ../../flows/checkout/assert-complete.yaml
+- runFlow: ../../flows/checkout/assert-returned-to-empty-cart.yaml
diff --git a/platforms/android/samples/CheckoutKitAndroidDemo/app/build.gradle b/platforms/android/samples/CheckoutKitAndroidDemo/app/build.gradle
index d9a6e1b26..b2eded034 100644
--- a/platforms/android/samples/CheckoutKitAndroidDemo/app/build.gradle
+++ b/platforms/android/samples/CheckoutKitAndroidDemo/app/build.gradle
@@ -59,6 +59,15 @@ def customerAccountRedirectHost = customerAccountRedirect?.host ?: "callback"
 // Demo buyer identity (prefill toggle in Settings)
 def prefillEmail = properties.getProperty("EMAIL", properties.getProperty("PREFILL_EMAIL", "test.buyer@example.com"))
 def prefillPhone = properties.getProperty("PHONE", properties.getProperty("PREFILL_PHONE", "+14165550100"))
+def prefillFirstName = propertyOrDefault("FIRST_NAME", "Evelyn")
+def prefillLastName = propertyOrDefault("LAST_NAME", "Hartley")
+def prefillAddress1 = propertyOrDefault("ADDRESS_1", "650 King Street")
+def prefillAddress2 = propertyOrDefault("ADDRESS_2", "Shopify HQ")
+def prefillCompany = propertyOrDefault("COMPANY", "Shopify")
+def prefillCity = propertyOrDefault("CITY", "Toronto")
+def prefillProvince = propertyOrDefault("PROVINCE", "ON")
+def prefillZip = propertyOrDefault("ZIP", "M5V 1M7")
+def prefillCountry = propertyOrDefault("COUNTRY", "CA")
 
 if (!storefrontDomain || !accessToken) {
     println("**** Please add a .env file with STOREFRONT_DOMAIN and STOREFRONT_ACCESS_TOKEN set *****")
@@ -93,6 +102,15 @@ android {
         buildConfigField "String", "customerAccountApiGraphQLBaseUrl", "\"$customerAccountApiGraphQLBaseUrl\""
         buildConfigField "String", "prefillEmail", "\"$prefillEmail\""
         buildConfigField "String", "prefillPhone", "\"$prefillPhone\""
+        buildConfigField "String", "prefillFirstName", "\"$prefillFirstName\""
+        buildConfigField "String", "prefillLastName", "\"$prefillLastName\""
+        buildConfigField "String", "prefillAddress1", "\"$prefillAddress1\""
+        buildConfigField "String", "prefillAddress2", "\"$prefillAddress2\""
+        buildConfigField "String", "prefillCompany", "\"$prefillCompany\""
+        buildConfigField "String", "prefillCity", "\"$prefillCity\""
+        buildConfigField "String", "prefillProvince", "\"$prefillProvince\""
+        buildConfigField "String", "prefillZip", "\"$prefillZip\""
+        buildConfigField "String", "prefillCountry", "\"$prefillCountry\""
     }
 
     signingConfigs {
diff --git a/platforms/android/samples/CheckoutKitAndroidDemo/app/src/main/java/com/shopify/checkoutkit/androiddemo/CheckoutKitApp.kt b/platforms/android/samples/CheckoutKitAndroidDemo/app/src/main/java/com/shopify/checkoutkit/androiddemo/CheckoutKitApp.kt
index 4f70b9c3b..19093e4f5 100644
--- a/platforms/android/samples/CheckoutKitAndroidDemo/app/src/main/java/com/shopify/checkoutkit/androiddemo/CheckoutKitApp.kt
+++ b/platforms/android/samples/CheckoutKitAndroidDemo/app/src/main/java/com/shopify/checkoutkit/androiddemo/CheckoutKitApp.kt
@@ -146,9 +146,10 @@ fun CheckoutKitAppRoot(
                             )
                         },
                         actions = {
-                            IconButton(onClick = {
-                                navController.navigate(Screen.Cart.route)
-                            }) {
+                            IconButton(
+                                onClick = { navController.navigate(Screen.Cart.route) },
+                                modifier = Modifier.testTag(AccessibilityIdentifiers.Tabs.CART),
+                            ) {
                                 BadgedBox(badge = {
                                     if (totalQuantity > 0) {
                                         Badge(
diff --git a/platforms/android/samples/CheckoutKitAndroidDemo/app/src/main/java/com/shopify/checkoutkit/androiddemo/accessibility/AccessibilityIdentifiers.kt b/platforms/android/samples/CheckoutKitAndroidDemo/app/src/main/java/com/shopify/checkoutkit/androiddemo/accessibility/AccessibilityIdentifiers.kt
index 5f95af6bf..d94343dfa 100644
--- a/platforms/android/samples/CheckoutKitAndroidDemo/app/src/main/java/com/shopify/checkoutkit/androiddemo/accessibility/AccessibilityIdentifiers.kt
+++ b/platforms/android/samples/CheckoutKitAndroidDemo/app/src/main/java/com/shopify/checkoutkit/androiddemo/accessibility/AccessibilityIdentifiers.kt
@@ -6,5 +6,10 @@ object AccessibilityIdentifiers {
     object Cart {
         const val CHECKOUT_READY = "cart-checkout-ready"
         const val CHECKOUT_BUTTON = "checkout-button"
+        const val EMPTY_MESSAGE = "cart-empty-message"
+    }
+
+    object Tabs {
+        const val CART = "cart-tab"
     }
 }
diff --git a/platforms/android/samples/CheckoutKitAndroidDemo/app/src/main/java/com/shopify/checkoutkit/androiddemo/cart/CartView.kt b/platforms/android/samples/CheckoutKitAndroidDemo/app/src/main/java/com/shopify/checkoutkit/androiddemo/cart/CartView.kt
index c36df4c9b..71e8d0dfc 100644
--- a/platforms/android/samples/CheckoutKitAndroidDemo/app/src/main/java/com/shopify/checkoutkit/androiddemo/cart/CartView.kt
+++ b/platforms/android/samples/CheckoutKitAndroidDemo/app/src/main/java/com/shopify/checkoutkit/androiddemo/cart/CartView.kt
@@ -277,6 +277,7 @@ private fun EmptyCartMessage(
         ) {
             Header2(
                 text = stringResource(id = R.string.cart_empty),
+                modifier = Modifier.testTag(AccessibilityIdentifiers.Cart.EMPTY_MESSAGE),
             )
             BodyMedium(
                 stringResource(id = R.string.cart_emtpy_description),
diff --git a/platforms/android/samples/CheckoutKitAndroidDemo/app/src/main/java/com/shopify/checkoutkit/androiddemo/cart/data/CartRepository.kt b/platforms/android/samples/CheckoutKitAndroidDemo/app/src/main/java/com/shopify/checkoutkit/androiddemo/cart/data/CartRepository.kt
index add07b5e4..c14dcb810 100644
--- a/platforms/android/samples/CheckoutKitAndroidDemo/app/src/main/java/com/shopify/checkoutkit/androiddemo/cart/data/CartRepository.kt
+++ b/platforms/android/samples/CheckoutKitAndroidDemo/app/src/main/java/com/shopify/checkoutkit/androiddemo/cart/data/CartRepository.kt
@@ -4,6 +4,7 @@ import com.apollographql.apollo.api.Optional
 import com.shopify.checkoutkit.androiddemo.common.ID
 import com.shopify.checkoutkit.androiddemo.common.client.StorefrontApiClient
 import com.shopify.checkoutkit.androiddemo.graphql.type.CartBuyerIdentityInput
+import com.shopify.checkoutkit.androiddemo.graphql.type.CartDeliveryInput
 import com.shopify.checkoutkit.androiddemo.graphql.type.CartInput
 import com.shopify.checkoutkit.androiddemo.graphql.type.CartLineInput
 import com.shopify.checkoutkit.androiddemo.graphql.type.CartLineUpdateInput
@@ -20,17 +21,7 @@ class CartRepository(
         demoBuyerIdentityEnabled: Boolean,
         customerAccessToken: String?,
     ): CartState.Cart {
-        val input = CartInput(
-            lines = Optional.present(
-                listOf(
-                    CartLineInput(
-                        merchandiseId = variantId.id,
-                        quantity = Optional.present(quantity),
-                    )
-                )
-            ),
-            buyerIdentity = Optional.present(buyerIdentity(demoBuyerIdentityEnabled, customerAccessToken)),
-        )
+        val input = cartInput(variantId, quantity, demoBuyerIdentityEnabled, customerAccessToken)
 
         val data = storefrontApiClient.createCart(input)
         val cartCreate = data.cartCreate
@@ -76,17 +67,53 @@ class CartRepository(
         }
     }
 
-    private fun buyerIdentity(demoBuyerIdentityEnabled: Boolean, customerAccessToken: String?): CartBuyerIdentityInput {
-        if (customerAccessToken != null) {
-            Timber.i("Setting a customer access token in buyer identity")
-            return CartBuyerIdentityInput(customerAccessToken = Optional.present(customerAccessToken))
+    companion object {
+        internal fun cartInput(
+            variantId: ID,
+            quantity: Int,
+            demoBuyerIdentityEnabled: Boolean,
+            customerAccessToken: String?,
+        ) = CartInput(
+            lines = Optional.present(
+                listOf(
+                    CartLineInput(
+                        merchandiseId = variantId.id,
+                        quantity = Optional.present(quantity),
+                    )
+                )
+            ),
+            buyerIdentity = Optional.present(buyerIdentity(demoBuyerIdentityEnabled, customerAccessToken)),
+            delivery = delivery(demoBuyerIdentityEnabled, customerAccessToken),
+        )
+
+        private fun buyerIdentity(
+            demoBuyerIdentityEnabled: Boolean,
+            customerAccessToken: String?,
+        ): CartBuyerIdentityInput {
+            if (customerAccessToken != null) {
+                Timber.i("Setting a customer access token in buyer identity")
+                return CartBuyerIdentityInput(customerAccessToken = Optional.present(customerAccessToken))
+            }
+
+            return if (demoBuyerIdentityEnabled) {
+                Timber.i("Using demo buyer identity data to prefill checkout")
+                DemoBuyerIdentity.value
+            } else {
+                CartBuyerIdentityInput(countryCode = Optional.present(CountryCode.CA))
+            }
         }
 
-        return if (demoBuyerIdentityEnabled) {
-            Timber.i("Using demo buyer identity data to prefill checkout")
-            DemoBuyerIdentity.value
-        } else {
-            CartBuyerIdentityInput(countryCode = Optional.present(CountryCode.CA))
+        // A signed in customer picks from the addresses the account already holds, so only the
+        // demo identity carries one of its own.
+        private fun delivery(
+            demoBuyerIdentityEnabled: Boolean,
+            customerAccessToken: String?,
+        ): Optional<CartDeliveryInput> {
+            if (customerAccessToken != null || !demoBuyerIdentityEnabled) {
+                return Optional.Absent
+            }
+
+            return Optional.present(DemoBuyerIdentity.delivery)
         }
     }
 }
diff --git a/platforms/android/samples/CheckoutKitAndroidDemo/app/src/main/java/com/shopify/checkoutkit/androiddemo/cart/data/DemoBuyerIdentity.kt b/platforms/android/samples/CheckoutKitAndroidDemo/app/src/main/java/com/shopify/checkoutkit/androiddemo/cart/data/DemoBuyerIdentity.kt
index 07c9b5f01..044be913e 100644
--- a/platforms/android/samples/CheckoutKitAndroidDemo/app/src/main/java/com/shopify/checkoutkit/androiddemo/cart/data/DemoBuyerIdentity.kt
+++ b/platforms/android/samples/CheckoutKitAndroidDemo/app/src/main/java/com/shopify/checkoutkit/androiddemo/cart/data/DemoBuyerIdentity.kt
@@ -2,13 +2,46 @@ package com.shopify.checkoutkit.androiddemo.cart.data
 
 import com.apollographql.apollo.api.Optional
 import com.shopify.checkoutkit.androiddemo.BuildConfig
+import com.shopify.checkoutkit.androiddemo.graphql.type.CartAddressInput
 import com.shopify.checkoutkit.androiddemo.graphql.type.CartBuyerIdentityInput
+import com.shopify.checkoutkit.androiddemo.graphql.type.CartDeliveryAddressInput
+import com.shopify.checkoutkit.androiddemo.graphql.type.CartDeliveryInput
+import com.shopify.checkoutkit.androiddemo.graphql.type.CartSelectableAddressInput
 import com.shopify.checkoutkit.androiddemo.graphql.type.CountryCode
 
 object DemoBuyerIdentity {
+    private val countryCode = CountryCode.safeValueOf(BuildConfig.prefillCountry)
+
     internal val value = CartBuyerIdentityInput(
         email = Optional.present(BuildConfig.prefillEmail),
-        countryCode = Optional.present(CountryCode.CA),
+        countryCode = Optional.present(countryCode),
         phone = Optional.present(BuildConfig.prefillPhone),
     )
+
+    internal val delivery = CartDeliveryInput(
+        addresses = Optional.present(
+            listOf(
+                CartSelectableAddressInput(
+                    address = CartAddressInput(
+                        deliveryAddress = Optional.present(
+                            CartDeliveryAddressInput(
+                                address1 = Optional.present(BuildConfig.prefillAddress1),
+                                address2 = Optional.present(BuildConfig.prefillAddress2),
+                                city = Optional.present(BuildConfig.prefillCity),
+                                company = Optional.present(BuildConfig.prefillCompany),
+                                countryCode = Optional.present(countryCode),
+                                firstName = Optional.present(BuildConfig.prefillFirstName),
+                                lastName = Optional.present(BuildConfig.prefillLastName),
+                                phone = Optional.present(BuildConfig.prefillPhone),
+                                provinceCode = Optional.present(BuildConfig.prefillProvince),
+                                zip = Optional.present(BuildConfig.prefillZip),
+                            )
+                        )
+                    ),
+                    selected = Optional.present(true),
+                    oneTimeUse = Optional.present(true),
+                )
+            )
+        )
+    )
 }
diff --git a/platforms/android/samples/CheckoutKitAndroidDemo/app/src/test/java/com/shopify/checkoutkit/androiddemo/accessibility/AccessibilityIdentifiersTest.kt b/platforms/android/samples/CheckoutKitAndroidDemo/app/src/test/java/com/shopify/checkoutkit/androiddemo/accessibility/AccessibilityIdentifiersTest.kt
index 511a97005..1d650a1ce 100644
--- a/platforms/android/samples/CheckoutKitAndroidDemo/app/src/test/java/com/shopify/checkoutkit/androiddemo/accessibility/AccessibilityIdentifiersTest.kt
+++ b/platforms/android/samples/CheckoutKitAndroidDemo/app/src/test/java/com/shopify/checkoutkit/androiddemo/accessibility/AccessibilityIdentifiersTest.kt
@@ -13,5 +13,11 @@ class AccessibilityIdentifiersTest {
     fun `cart markers match the maestro flows`() {
         assertThat(AccessibilityIdentifiers.Cart.CHECKOUT_READY).isEqualTo("cart-checkout-ready")
         assertThat(AccessibilityIdentifiers.Cart.CHECKOUT_BUTTON).isEqualTo("checkout-button")
+        assertThat(AccessibilityIdentifiers.Cart.EMPTY_MESSAGE).isEqualTo("cart-empty-message")
+    }
+
+    @Test
+    fun `tab markers match the maestro flows`() {
+        assertThat(AccessibilityIdentifiers.Tabs.CART).isEqualTo("cart-tab")
     }
 }
diff --git a/platforms/android/samples/CheckoutKitAndroidDemo/app/src/test/java/com/shopify/checkoutkit/androiddemo/cart/data/CartRepositoryTest.kt b/platforms/android/samples/CheckoutKitAndroidDemo/app/src/test/java/com/shopify/checkoutkit/androiddemo/cart/data/CartRepositoryTest.kt
new file mode 100644
index 000000000..4b0645047
--- /dev/null
+++ b/platforms/android/samples/CheckoutKitAndroidDemo/app/src/test/java/com/shopify/checkoutkit/androiddemo/cart/data/CartRepositoryTest.kt
@@ -0,0 +1,38 @@
+package com.shopify.checkoutkit.androiddemo.cart.data
+
+import com.shopify.checkoutkit.androiddemo.common.ID
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.Test
+
+class CartRepositoryTest {
+
+    @Test
+    fun `demo buyer identity supplies the delivery address`() {
+        val input = cartInput(demoBuyerIdentityEnabled = true, customerAccessToken = null)
+
+        assertThat(input.delivery.getOrThrow()).isEqualTo(DemoBuyerIdentity.delivery)
+        assertThat(input.buyerIdentity.getOrThrow()).isEqualTo(DemoBuyerIdentity.value)
+    }
+
+    @Test
+    fun `a guest supplies no delivery address`() {
+        val input = cartInput(demoBuyerIdentityEnabled = false, customerAccessToken = null)
+
+        assertThat(input.delivery.getOrNull()).isNull()
+    }
+
+    @Test
+    fun `a signed in customer supplies no delivery address`() {
+        val input = cartInput(demoBuyerIdentityEnabled = true, customerAccessToken = "token")
+
+        assertThat(input.delivery.getOrNull()).isNull()
+    }
+
+    private fun cartInput(demoBuyerIdentityEnabled: Boolean, customerAccessToken: String?) =
+        CartRepository.cartInput(
+            variantId = ID("gid://shopify/ProductVariant/1"),
+            quantity = 1,
+            demoBuyerIdentityEnabled = demoBuyerIdentityEnabled,
+            customerAccessToken = customerAccessToken,
+        )
+}
diff --git a/platforms/android/samples/CheckoutKitAndroidDemo/app/src/test/java/com/shopify/checkoutkit/androiddemo/cart/data/DemoBuyerIdentityTest.kt b/platforms/android/samples/CheckoutKitAndroidDemo/app/src/test/java/com/shopify/checkoutkit/androiddemo/cart/data/DemoBuyerIdentityTest.kt
new file mode 100644
index 000000000..df60dcfc8
--- /dev/null
+++ b/platforms/android/samples/CheckoutKitAndroidDemo/app/src/test/java/com/shopify/checkoutkit/androiddemo/cart/data/DemoBuyerIdentityTest.kt
@@ -0,0 +1,44 @@
+package com.shopify.checkoutkit.androiddemo.cart.data
+
+import com.shopify.checkoutkit.androiddemo.BuildConfig
+import com.shopify.checkoutkit.androiddemo.graphql.type.CountryCode
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.Test
+
+class DemoBuyerIdentityTest {
+
+    @Test
+    fun `buyer identity carries the contact details`() {
+        val identity = DemoBuyerIdentity.value
+
+        assertThat(identity.email.getOrThrow()).isEqualTo(BuildConfig.prefillEmail)
+        assertThat(identity.phone.getOrThrow()).isEqualTo(BuildConfig.prefillPhone)
+        assertThat(identity.countryCode.getOrThrow()).isEqualTo(CountryCode.safeValueOf(BuildConfig.prefillCountry))
+    }
+
+    @Test
+    fun `delivery carries one pre-selected one-time address`() {
+        val addresses = DemoBuyerIdentity.delivery.addresses.getOrThrow()!!
+
+        assertThat(addresses).hasSize(1)
+        assertThat(addresses.first().selected.getOrThrow()).isTrue()
+        assertThat(addresses.first().oneTimeUse.getOrThrow()).isTrue()
+    }
+
+    @Test
+    fun `delivery address carries every field checkout asks a guest for`() {
+        val address = DemoBuyerIdentity.delivery.addresses.getOrThrow()!!
+            .first().address.deliveryAddress.getOrThrow()!!
+
+        assertThat(address.firstName.getOrThrow()).isEqualTo(BuildConfig.prefillFirstName)
+        assertThat(address.lastName.getOrThrow()).isEqualTo(BuildConfig.prefillLastName)
+        assertThat(address.address1.getOrThrow()).isEqualTo(BuildConfig.prefillAddress1)
+        assertThat(address.address2.getOrThrow()).isEqualTo(BuildConfig.prefillAddress2)
+        assertThat(address.company.getOrThrow()).isEqualTo(BuildConfig.prefillCompany)
+        assertThat(address.city.getOrThrow()).isEqualTo(BuildConfig.prefillCity)
+        assertThat(address.provinceCode.getOrThrow()).isEqualTo(BuildConfig.prefillProvince)
+        assertThat(address.zip.getOrThrow()).isEqualTo(BuildConfig.prefillZip)
+        assertThat(address.phone.getOrThrow()).isEqualTo(BuildConfig.prefillPhone)
+        assertThat(address.countryCode.getOrThrow()).isEqualTo(CountryCode.safeValueOf(BuildConfig.prefillCountry))
+    }
+}
diff --git a/platforms/swift/Samples/CheckoutKitSwiftDemo/CheckoutKitSwiftDemo/Sources/Accessibility/AccessibilityIdentifiers.swift b/platforms/swift/Samples/CheckoutKitSwiftDemo/CheckoutKitSwiftDemo/Sources/Accessibility/AccessibilityIdentifiers.swift
index 295073f23..fd3f2a42a 100644
--- a/platforms/swift/Samples/CheckoutKitSwiftDemo/CheckoutKitSwiftDemo/Sources/Accessibility/AccessibilityIdentifiers.swift
+++ b/platforms/swift/Samples/CheckoutKitSwiftDemo/CheckoutKitSwiftDemo/Sources/Accessibility/AccessibilityIdentifiers.swift
@@ -4,5 +4,10 @@ enum AccessibilityIdentifiers {
     enum Cart {
         static let checkoutReady = "cart-checkout-ready"
         static let checkoutButton = "checkout-button"
+        static let emptyMessage = "cart-empty-message"
+    }
+
+    enum Tabs {
+        static let cart = "cart-tab"
     }
 }
diff --git a/platforms/swift/Samples/CheckoutKitSwiftDemo/CheckoutKitSwiftDemo/Sources/App/SceneDelegate.swift b/platforms/swift/Samples/CheckoutKitSwiftDemo/CheckoutKitSwiftDemo/Sources/App/SceneDelegate.swift
index e597278a5..e5ffbfb19 100644
--- a/platforms/swift/Samples/CheckoutKitSwiftDemo/CheckoutKitSwiftDemo/Sources/App/SceneDelegate.swift
+++ b/platforms/swift/Samples/CheckoutKitSwiftDemo/CheckoutKitSwiftDemo/Sources/App/SceneDelegate.swift
@@ -101,6 +101,7 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
         // Cart (UI Kit)
         swiftUICartController.tabBarItem.image = UIImage(systemName: "cart")
         swiftUICartController.tabBarItem.title = "Cart"
+        swiftUICartController.tabBarItem.accessibilityIdentifier = AccessibilityIdentifiers.Tabs.cart
         swiftUICartController.navigationItem.title = "Cart (SwiftUI)"
 
         // Account
diff --git a/platforms/swift/Samples/CheckoutKitSwiftDemo/CheckoutKitSwiftDemo/Sources/Scenes/Cart/CartView.swift b/platforms/swift/Samples/CheckoutKitSwiftDemo/CheckoutKitSwiftDemo/Sources/Scenes/Cart/CartView.swift
index b7bda1d3a..46dadcfec 100644
--- a/platforms/swift/Samples/CheckoutKitSwiftDemo/CheckoutKitSwiftDemo/Sources/Scenes/Cart/CartView.swift
+++ b/platforms/swift/Samples/CheckoutKitSwiftDemo/CheckoutKitSwiftDemo/Sources/Scenes/Cart/CartView.swift
@@ -175,6 +175,7 @@ struct EmptyState: View {
                 .padding(.bottom, 6)
             Text("Your cart is empty.")
                 .font(.caption)
+                .accessibilityIdentifier(AccessibilityIdentifiers.Cart.emptyMessage)
         }
     }
 }
diff --git a/platforms/swift/Samples/CheckoutKitSwiftDemo/CheckoutKitSwiftDemoTests/Accessibility/AccessibilityIdentifiersTests.swift b/platforms/swift/Samples/CheckoutKitSwiftDemo/CheckoutKitSwiftDemoTests/Accessibility/AccessibilityIdentifiersTests.swift
index 52c6e4373..6fc5b5cf4 100644
--- a/platforms/swift/Samples/CheckoutKitSwiftDemo/CheckoutKitSwiftDemoTests/Accessibility/AccessibilityIdentifiersTests.swift
+++ b/platforms/swift/Samples/CheckoutKitSwiftDemo/CheckoutKitSwiftDemoTests/Accessibility/AccessibilityIdentifiersTests.swift
@@ -9,5 +9,10 @@ class AccessibilityIdentifiersTests: XCTestCase {
     func testCartMarkersMatchTheMaestroFlows() {
         XCTAssertEqual(AccessibilityIdentifiers.Cart.checkoutReady, "cart-checkout-ready")
         XCTAssertEqual(AccessibilityIdentifiers.Cart.checkoutButton, "checkout-button")
+        XCTAssertEqual(AccessibilityIdentifiers.Cart.emptyMessage, "cart-empty-message")
+    }
+
+    func testTabMarkersMatchTheMaestroFlows() {
+        XCTAssertEqual(AccessibilityIdentifiers.Tabs.cart, "cart-tab")
     }
 }