diff --git a/service/src/main/java/org/whispersystems/textsecuregcm/controllers/AccountController.java b/service/src/main/java/org/whispersystems/textsecuregcm/controllers/AccountController.java
index 4a68e1349..21c07c267 100644
--- a/service/src/main/java/org/whispersystems/textsecuregcm/controllers/AccountController.java
+++ b/service/src/main/java/org/whispersystems/textsecuregcm/controllers/AccountController.java
@@ -399,38 +399,47 @@ public class AccountController {
   @PUT
   @Path("/number")
   @Produces(MediaType.APPLICATION_JSON)
-  public void changeNumber(@Auth final AuthenticatedAccount authenticatedAccount, @Valid final ChangePhoneNumberRequest request)
+  public AccountIdentityResponse changeNumber(@Auth final AuthenticatedAccount authenticatedAccount, @Valid final ChangePhoneNumberRequest request)
       throws RateLimitExceededException, InterruptedException, ImpossiblePhoneNumberException, NonNormalizedPhoneNumberException {
 
+    final Account updatedAccount;
+
     if (request.getNumber().equals(authenticatedAccount.getAccount().getNumber())) {
       // This may be a request that got repeated due to poor network conditions or other client error; take no action,
       // but report success since the account is in the desired state
-      return;
+      updatedAccount = authenticatedAccount.getAccount();
+    } else {
+      Util.requireNormalizedNumber(request.getNumber());
+
+      rateLimiters.getVerifyLimiter().validate(request.getNumber());
+
+      final Optional<StoredVerificationCode> storedVerificationCode =
+          pendingAccounts.getCodeForNumber(request.getNumber());
+
+      if (storedVerificationCode.isEmpty() || !storedVerificationCode.get().isValid(request.getCode())) {
+        throw new WebApplicationException(Response.status(403).build());
+      }
+
+      storedVerificationCode.flatMap(StoredVerificationCode::getTwilioVerificationSid)
+          .ifPresent(smsSender::reportVerificationSucceeded);
+
+      final Optional<Account> existingAccount = accounts.getByE164(request.getNumber());
+
+      if (existingAccount.isPresent()) {
+        verifyRegistrationLock(existingAccount.get(), request.getRegistrationLock());
+      }
+
+      rateLimiters.getVerifyLimiter().clear(request.getNumber());
+
+      updatedAccount = accounts.changeNumber(authenticatedAccount.getAccount(), request.getNumber());
     }
 
-    Util.requireNormalizedNumber(request.getNumber());
-
-    rateLimiters.getVerifyLimiter().validate(request.getNumber());
-
-    final Optional<StoredVerificationCode> storedVerificationCode =
-        pendingAccounts.getCodeForNumber(request.getNumber());
-
-    if (storedVerificationCode.isEmpty() || !storedVerificationCode.get().isValid(request.getCode())) {
-      throw new WebApplicationException(Response.status(403).build());
-    }
-
-    storedVerificationCode.flatMap(StoredVerificationCode::getTwilioVerificationSid)
-        .ifPresent(smsSender::reportVerificationSucceeded);
-
-    final Optional<Account> existingAccount = accounts.getByE164(request.getNumber());
-
-    if (existingAccount.isPresent()) {
-      verifyRegistrationLock(existingAccount.get(), request.getRegistrationLock());
-    }
-
-    rateLimiters.getVerifyLimiter().clear(request.getNumber());
-
-    accounts.changeNumber(authenticatedAccount.getAccount(), request.getNumber());
+    return new AccountIdentityResponse(
+        updatedAccount.getUuid(),
+        updatedAccount.getNumber(),
+        updatedAccount.getPhoneNumberIdentifier(),
+        updatedAccount.getUsername().orElse(null),
+        updatedAccount.isStorageSupported());
   }
 
   @Timed
diff --git a/service/src/test/java/org/whispersystems/textsecuregcm/tests/controllers/AccountControllerTest.java b/service/src/test/java/org/whispersystems/textsecuregcm/tests/controllers/AccountControllerTest.java
index dc6c8310d..a967a1ea9 100644
--- a/service/src/test/java/org/whispersystems/textsecuregcm/tests/controllers/AccountControllerTest.java
+++ b/service/src/test/java/org/whispersystems/textsecuregcm/tests/controllers/AccountControllerTest.java
@@ -52,6 +52,7 @@ import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;
 import org.junit.jupiter.params.provider.ValueSource;
 import org.mockito.ArgumentCaptor;
+import org.mockito.invocation.InvocationOnMock;
 import org.mockito.stubbing.Answer;
 import org.whispersystems.textsecuregcm.auth.AuthenticatedAccount;
 import org.whispersystems.textsecuregcm.auth.AuthenticationCredentials;
@@ -243,6 +244,20 @@ class AccountControllerTest {
     when(accountsManager.setUsername(AuthHelper.VALID_ACCOUNT, "takenusername"))
         .thenThrow(new UsernameNotAvailableException());
 
+    when(accountsManager.changeNumber(any(), any())).thenAnswer((Answer<Account>) invocation -> {
+      final Account account = invocation.getArgument(0, Account.class);
+      final String number = invocation.getArgument(1, String.class);
+
+      final UUID uuid = account.getUuid();
+
+      final Account updatedAccount = mock(Account.class);
+      when(updatedAccount.getUuid()).thenReturn(uuid);
+      when(updatedAccount.getNumber()).thenReturn(number);
+      when(updatedAccount.getPhoneNumberIdentifier()).thenReturn(UUID.randomUUID());
+
+      return updatedAccount;
+    });
+
     {
       DynamicConfiguration dynamicConfiguration = mock(DynamicConfiguration.class);
       when(dynamicConfigurationManager.getConfiguration())
@@ -1214,16 +1229,19 @@ class AccountControllerTest {
     when(pendingAccountsManager.getCodeForNumber(number)).thenReturn(Optional.of(
         new StoredVerificationCode(code, System.currentTimeMillis(), "push", null)));
 
-    final Response response =
+    final AccountIdentityResponse accountIdentityResponse =
         resources.getJerseyTest()
             .target("/v1/accounts/number")
             .request()
             .header("Authorization", AuthHelper.getAuthHeader(AuthHelper.VALID_UUID, AuthHelper.VALID_PASSWORD))
             .put(Entity.entity(new ChangePhoneNumberRequest(number, code, null),
-                MediaType.APPLICATION_JSON_TYPE));
+                MediaType.APPLICATION_JSON_TYPE), AccountIdentityResponse.class);
 
-    assertThat(response.getStatus()).isEqualTo(204);
     verify(accountsManager).changeNumber(AuthHelper.VALID_ACCOUNT, number);
+
+    assertThat(accountIdentityResponse.getUuid()).isEqualTo(AuthHelper.VALID_UUID);
+    assertThat(accountIdentityResponse.getNumber()).isEqualTo(number);
+    assertThat(accountIdentityResponse.getPni()).isNotEqualTo(AuthHelper.VALID_PNI);
   }
 
   @Test
@@ -1268,16 +1286,19 @@ class AccountControllerTest {
 
   @Test
   void testChangePhoneNumberSameNumber() throws InterruptedException {
-    final Response response =
+    final AccountIdentityResponse accountIdentityResponse =
         resources.getJerseyTest()
             .target("/v1/accounts/number")
             .request()
             .header("Authorization", AuthHelper.getAuthHeader(AuthHelper.VALID_UUID, AuthHelper.VALID_PASSWORD))
             .put(Entity.entity(new ChangePhoneNumberRequest(AuthHelper.VALID_NUMBER, "567890", null),
-                MediaType.APPLICATION_JSON_TYPE));
+                MediaType.APPLICATION_JSON_TYPE), AccountIdentityResponse.class);
 
-    assertThat(response.getStatus()).isEqualTo(204);
     verify(accountsManager, never()).changeNumber(eq(AuthHelper.VALID_ACCOUNT), any());
+
+    assertThat(accountIdentityResponse.getUuid()).isEqualTo(AuthHelper.VALID_UUID);
+    assertThat(accountIdentityResponse.getNumber()).isEqualTo(AuthHelper.VALID_NUMBER);
+    assertThat(accountIdentityResponse.getPni()).isEqualTo(AuthHelper.VALID_PNI);
   }
 
   @Test
@@ -1345,7 +1366,7 @@ class AccountControllerTest {
             .put(Entity.entity(new ChangePhoneNumberRequest(number, code, null),
                 MediaType.APPLICATION_JSON_TYPE));
 
-    assertThat(response.getStatus()).isEqualTo(204);
+    assertThat(response.getStatus()).isEqualTo(200);
     verify(accountsManager).changeNumber(eq(AuthHelper.VALID_ACCOUNT), any());
   }
 
@@ -1439,7 +1460,7 @@ class AccountControllerTest {
             .put(Entity.entity(new ChangePhoneNumberRequest(number, code, reglock),
                 MediaType.APPLICATION_JSON_TYPE));
 
-    assertThat(response.getStatus()).isEqualTo(204);
+    assertThat(response.getStatus()).isEqualTo(200);
     verify(accountsManager).changeNumber(eq(AuthHelper.VALID_ACCOUNT), any());
   }