diff --git a/native/account/registration/registration-server-call.js b/native/account/registration/registration-server-call.js
index 6fe6eb0aa..90bed58d3 100644
--- a/native/account/registration/registration-server-call.js
+++ b/native/account/registration/registration-server-call.js
@@ -1,517 +1,546 @@
 // @flow
 
 import * as React from 'react';
 
 import { setDataLoadedActionType } from 'lib/actions/client-db-store-actions.js';
 import { setSyncedMetadataEntryActionType } from 'lib/actions/synced-metadata-actions.js';
 import {
   legacyKeyserverRegisterActionTypes,
   legacyKeyserverRegister,
   useIdentityPasswordRegister,
   identityRegisterActionTypes,
   deleteAccountActionTypes,
   useDeleteDiscardedIdentityAccount,
 } from 'lib/actions/user-actions.js';
 import { useKeyserverAuthWithRetry } from 'lib/keyserver-conn/keyserver-auth.js';
 import { useLegacyAshoatKeyserverCall } from 'lib/keyserver-conn/legacy-keyserver-call.js';
 import { isLoggedInToKeyserver } from 'lib/selectors/user-selectors.js';
 import {
   type LegacyLogInStartingPayload,
   logInActionSources,
 } from 'lib/types/account-types.js';
 import { syncedMetadataNames } from 'lib/types/synced-metadata-types.js';
 import { getMessageForException } from 'lib/utils/errors.js';
 import { useDispatchActionPromise } from 'lib/utils/redux-promise-utils.js';
 import { useDispatch } from 'lib/utils/redux-utils.js';
 import { usingCommServicesAccessToken } from 'lib/utils/services-utils.js';
 import { setURLPrefix } from 'lib/utils/url-utils.js';
 import { waitUntilDatabaseDeleted } from 'lib/utils/wait-until-db-deleted.js';
 
 import type {
   RegistrationServerCallInput,
   UsernameAccountSelection,
   AvatarData,
 } from './registration-types.js';
 import { authoritativeKeyserverID } from '../../authoritative-keyserver.js';
 import {
   useNativeSetUserAvatar,
   useUploadSelectedMedia,
 } from '../../avatars/avatar-hooks.js';
 import { commCoreModule } from '../../native-modules.js';
 import { useSelector } from '../../redux/redux-utils.js';
 import { nativeLegacyLogInExtraInfoSelector } from '../../selectors/account-selectors.js';
 import {
   appOutOfDateAlertDetails,
   usernameReservedAlertDetails,
   usernameTakenAlertDetails,
   unknownErrorAlertDetails,
 } from '../../utils/alert-messages.js';
 import Alert from '../../utils/alert.js';
 import { defaultURLPrefix } from '../../utils/url-utils.js';
 import { setNativeCredentials } from '../native-credentials.js';
 import {
   useLegacySIWEServerCall,
   useIdentityWalletRegisterCall,
 } from '../siwe-hooks.js';
 
 // We can't just do everything in one async callback, since the server calls
 // would get bound to Redux state from before the registration. The registration
 // flow has multiple steps where critical Redux state is changed, where
 // subsequent steps depend on accessing the updated Redux state.
 
 // To address this, we break the registration process up into multiple steps.
 // When each step completes we update the currentStep state, and we have Redux
 // selectors that trigger useEffects for subsequent steps when relevant data
 // starts to appear in Redux.
 
 type CurrentStep =
   | { +step: 'inactive' }
   | {
       +step: 'identity_registration_dispatched',
       +clearCachedSelections: () => void,
       +onAlertAcknowledged: ?() => mixed,
       +avatarData: ?AvatarData,
       +credentialsToSave: ?{ +username: string, +password: string },
       +resolve: () => void,
       +reject: Error => void,
     }
   | {
       +step: 'authoritative_keyserver_registration_dispatched',
       +clearCachedSelections: () => void,
       +avatarData: ?AvatarData,
       +credentialsToSave: ?{ +username: string, +password: string },
       +resolve: () => void,
       +reject: Error => void,
     };
 
 const inactiveStep = { step: 'inactive' };
 
 function useRegistrationServerCall(): RegistrationServerCallInput => Promise<void> {
   const [currentStep, setCurrentStep] =
     React.useState<CurrentStep>(inactiveStep);
 
   // STEP 1: ACCOUNT REGISTRATION
 
   const legacyLogInExtraInfo = useSelector(nativeLegacyLogInExtraInfoSelector);
 
   const dispatchActionPromise = useDispatchActionPromise();
   const callLegacyKeyserverRegister = useLegacyAshoatKeyserverCall(
     legacyKeyserverRegister,
   );
   const callIdentityPasswordRegister = useIdentityPasswordRegister();
 
   const identityRegisterUsernameAccount = React.useCallback(
     async (
       accountSelection: UsernameAccountSelection,
       farcasterID: ?string,
       onAlertAcknowledged: ?() => mixed,
     ) => {
       const identityRegisterPromise = (async () => {
         try {
           return await callIdentityPasswordRegister(
             accountSelection.username,
             accountSelection.password,
             farcasterID,
           );
         } catch (e) {
           const messageForException = getMessageForException(e);
           if (messageForException === 'username reserved') {
             Alert.alert(
               usernameReservedAlertDetails.title,
               usernameReservedAlertDetails.message,
               [{ text: 'OK', onPress: onAlertAcknowledged }],
               { cancelable: !onAlertAcknowledged },
             );
           } else if (messageForException === 'username already exists') {
             Alert.alert(
               usernameTakenAlertDetails.title,
               usernameTakenAlertDetails.message,
               [{ text: 'OK', onPress: onAlertAcknowledged }],
               { cancelable: !onAlertAcknowledged },
             );
           } else if (messageForException === 'Unsupported version') {
             Alert.alert(
               appOutOfDateAlertDetails.title,
               appOutOfDateAlertDetails.message,
               [{ text: 'OK', onPress: onAlertAcknowledged }],
               { cancelable: !onAlertAcknowledged },
             );
           } else {
             Alert.alert(
               unknownErrorAlertDetails.title,
               unknownErrorAlertDetails.message,
               [{ text: 'OK', onPress: onAlertAcknowledged }],
               { cancelable: !onAlertAcknowledged },
             );
           }
           throw e;
         }
       })();
       void dispatchActionPromise(
         identityRegisterActionTypes,
         identityRegisterPromise,
       );
       await identityRegisterPromise;
     },
     [callIdentityPasswordRegister, dispatchActionPromise],
   );
 
   const legacyKeyserverRegisterUsernameAccount = React.useCallback(
     async (
       accountSelection: UsernameAccountSelection,
       keyserverURL: string,
       onAlertAcknowledged: ?() => mixed,
     ) => {
       const extraInfo = await legacyLogInExtraInfo();
       const legacyKeyserverRegisterPromise = (async () => {
         try {
           return await callLegacyKeyserverRegister(
             {
               ...extraInfo,
               username: accountSelection.username,
               password: accountSelection.password,
             },
             {
               urlPrefixOverride: keyserverURL,
             },
           );
         } catch (e) {
           const messageForException = getMessageForException(e);
           if (messageForException === 'username_reserved') {
             Alert.alert(
               usernameReservedAlertDetails.title,
               usernameReservedAlertDetails.message,
               [{ text: 'OK', onPress: onAlertAcknowledged }],
               { cancelable: !onAlertAcknowledged },
             );
           } else if (messageForException === 'username_taken') {
             Alert.alert(
               usernameTakenAlertDetails.title,
               usernameTakenAlertDetails.message,
               [{ text: 'OK', onPress: onAlertAcknowledged }],
               { cancelable: !onAlertAcknowledged },
             );
           } else if (messageForException === 'client_version_unsupported') {
             Alert.alert(
               appOutOfDateAlertDetails.title,
               appOutOfDateAlertDetails.message,
               [{ text: 'OK', onPress: onAlertAcknowledged }],
               { cancelable: !onAlertAcknowledged },
             );
           } else {
             Alert.alert(
               unknownErrorAlertDetails.title,
               unknownErrorAlertDetails.message,
               [{ text: 'OK', onPress: onAlertAcknowledged }],
               { cancelable: !onAlertAcknowledged },
             );
           }
           throw e;
         }
       })();
       void dispatchActionPromise(
         legacyKeyserverRegisterActionTypes,
         legacyKeyserverRegisterPromise,
         undefined,
         ({
           calendarQuery: extraInfo.calendarQuery,
         }: LegacyLogInStartingPayload),
       );
       await legacyKeyserverRegisterPromise;
     },
     [legacyLogInExtraInfo, callLegacyKeyserverRegister, dispatchActionPromise],
   );
 
   const legacySiweServerCall = useLegacySIWEServerCall();
   const identityWalletRegisterCall = useIdentityWalletRegisterCall();
   const dispatch = useDispatch();
   const returnedFunc = React.useCallback(
     (input: RegistrationServerCallInput) =>
       new Promise<void>(
         // eslint-disable-next-line no-async-promise-executor
         async (resolve, reject) => {
           try {
             if (currentStep.step !== 'inactive') {
               return;
             }
             const {
               accountSelection,
               avatarData,
               keyserverURL: passedKeyserverURL,
               farcasterID,
               siweBackupSecrets,
               clearCachedSelections,
               onNonceExpired,
               onAlertAcknowledged,
             } = input;
             const keyserverURL = passedKeyserverURL ?? defaultURLPrefix;
             if (
               accountSelection.accountType === 'username' &&
               !usingCommServicesAccessToken
             ) {
               await legacyKeyserverRegisterUsernameAccount(
                 accountSelection,
                 keyserverURL,
                 onAlertAcknowledged,
               );
             } else if (accountSelection.accountType === 'username') {
               await identityRegisterUsernameAccount(
                 accountSelection,
                 farcasterID,
                 onAlertAcknowledged,
               );
             } else if (!usingCommServicesAccessToken) {
               try {
                 await legacySiweServerCall(accountSelection, {
                   urlPrefixOverride: keyserverURL,
                 });
               } catch (e) {
-                Alert.alert(
-                  unknownErrorAlertDetails.title,
-                  unknownErrorAlertDetails.message,
-                  [{ text: 'OK', onPress: onAlertAcknowledged }],
-                  { cancelable: !onAlertAcknowledged },
-                );
+                const messageForException = getMessageForException(e);
+                if (messageForException === 'client_version_unsupported') {
+                  Alert.alert(
+                    appOutOfDateAlertDetails.title,
+                    appOutOfDateAlertDetails.message,
+                    [{ text: 'OK', onPress: onAlertAcknowledged }],
+                    { cancelable: !onAlertAcknowledged },
+                  );
+                } else {
+                  Alert.alert(
+                    unknownErrorAlertDetails.title,
+                    unknownErrorAlertDetails.message,
+                    [{ text: 'OK', onPress: onAlertAcknowledged }],
+                    { cancelable: !onAlertAcknowledged },
+                  );
+                }
                 throw e;
               }
             } else {
               try {
                 await identityWalletRegisterCall({
                   address: accountSelection.address,
                   message: accountSelection.message,
                   signature: accountSelection.signature,
                   fid: farcasterID,
                 });
               } catch (e) {
                 const messageForException = getMessageForException(e);
                 if (messageForException === 'nonce expired') {
                   onNonceExpired();
+                } else if (messageForException === 'Unsupported version') {
+                  Alert.alert(
+                    appOutOfDateAlertDetails.title,
+                    appOutOfDateAlertDetails.message,
+                    [{ text: 'OK', onPress: onAlertAcknowledged }],
+                    { cancelable: !onAlertAcknowledged },
+                  );
                 } else {
                   Alert.alert(
                     unknownErrorAlertDetails.title,
                     unknownErrorAlertDetails.message,
                     [{ text: 'OK', onPress: onAlertAcknowledged }],
                     { cancelable: !onAlertAcknowledged },
                   );
                 }
                 throw e;
               }
             }
             if (passedKeyserverURL) {
               dispatch({
                 type: setURLPrefix,
                 payload: passedKeyserverURL,
               });
             }
             if (farcasterID) {
               dispatch({
                 type: setSyncedMetadataEntryActionType,
                 payload: {
                   name: syncedMetadataNames.CURRENT_USER_FID,
                   data: farcasterID,
                 },
               });
             }
             if (siweBackupSecrets) {
               await commCoreModule.setSIWEBackupSecrets(siweBackupSecrets);
             }
             const credentialsToSave =
               accountSelection.accountType === 'username'
                 ? {
                     username: accountSelection.username,
                     password: accountSelection.password,
                   }
                 : null;
             if (usingCommServicesAccessToken) {
               setCurrentStep({
                 step: 'identity_registration_dispatched',
                 avatarData,
                 clearCachedSelections,
                 onAlertAcknowledged,
                 credentialsToSave,
                 resolve,
                 reject,
               });
             } else {
               setCurrentStep({
                 step: 'authoritative_keyserver_registration_dispatched',
                 avatarData,
                 clearCachedSelections,
                 credentialsToSave,
                 resolve,
                 reject,
               });
             }
           } catch (e) {
             reject(e);
           }
         },
       ),
     [
       currentStep,
       legacyKeyserverRegisterUsernameAccount,
       identityRegisterUsernameAccount,
       legacySiweServerCall,
       dispatch,
       identityWalletRegisterCall,
     ],
   );
 
   // STEP 2: REGISTERING ON AUTHORITATIVE KEYSERVER
 
   const keyserverAuth = useKeyserverAuthWithRetry(authoritativeKeyserverID);
 
   const isRegisteredOnIdentity = useSelector(
     state =>
       !!state.commServicesAccessToken &&
       !!state.currentUserInfo &&
       !state.currentUserInfo.anonymous,
   );
 
   // We call deleteDiscardedIdentityAccount in order to reset state if identity
   // registration succeeds but authoritative keyserver auth fails
   const deleteDiscardedIdentityAccount = useDeleteDiscardedIdentityAccount();
 
   const registeringOnAuthoritativeKeyserverRef = React.useRef(false);
   React.useEffect(() => {
     if (
       !isRegisteredOnIdentity ||
       currentStep.step !== 'identity_registration_dispatched' ||
       registeringOnAuthoritativeKeyserverRef.current
     ) {
       return;
     }
     registeringOnAuthoritativeKeyserverRef.current = true;
     const {
       avatarData,
       clearCachedSelections,
       onAlertAcknowledged,
       credentialsToSave,
       resolve,
       reject,
     } = currentStep;
     void (async () => {
       try {
         await keyserverAuth({
           authActionSource: process.env.BROWSER
             ? logInActionSources.keyserverAuthFromWeb
             : logInActionSources.keyserverAuthFromNative,
           setInProgress: () => {},
           hasBeenCancelled: () => false,
           doNotRegister: false,
         });
         setCurrentStep({
           step: 'authoritative_keyserver_registration_dispatched',
           avatarData,
           clearCachedSelections,
           credentialsToSave,
           resolve,
           reject,
         });
       } catch (keyserverAuthException) {
+        const messageForException = getMessageForException(
+          keyserverAuthException,
+        );
         const discardIdentityAccountPromise = (async () => {
           try {
             const deletionResult = await deleteDiscardedIdentityAccount();
-            Alert.alert(
-              unknownErrorAlertDetails.title,
-              unknownErrorAlertDetails.message,
-              [{ text: 'OK', onPress: onAlertAcknowledged }],
-              { cancelable: !onAlertAcknowledged },
-            );
+            if (messageForException === 'client_version_unsupported') {
+              Alert.alert(
+                appOutOfDateAlertDetails.title,
+                appOutOfDateAlertDetails.message,
+                [{ text: 'OK', onPress: onAlertAcknowledged }],
+                { cancelable: !onAlertAcknowledged },
+              );
+            } else {
+              Alert.alert(
+                unknownErrorAlertDetails.title,
+                unknownErrorAlertDetails.message,
+                [{ text: 'OK', onPress: onAlertAcknowledged }],
+                { cancelable: !onAlertAcknowledged },
+              );
+            }
             return deletionResult;
           } catch (deleteException) {
             Alert.alert(
               'Account created but login failed',
               'We were able to create your account, but were unable to log ' +
                 'you in. Try going back to the login screen and logging in ' +
                 'with your new credentials.',
               [{ text: 'OK', onPress: onAlertAcknowledged }],
               { cancelable: !onAlertAcknowledged },
             );
             throw deleteException;
           }
         })();
         void dispatchActionPromise(
           deleteAccountActionTypes,
           discardIdentityAccountPromise,
         );
         await waitUntilDatabaseDeleted();
         reject(keyserverAuthException);
         setCurrentStep(inactiveStep);
       } finally {
         registeringOnAuthoritativeKeyserverRef.current = false;
       }
     })();
   }, [
     currentStep,
     isRegisteredOnIdentity,
     keyserverAuth,
     dispatchActionPromise,
     deleteDiscardedIdentityAccount,
   ]);
 
   // STEP 3: SETTING AVATAR
 
   const uploadSelectedMedia = useUploadSelectedMedia();
   const nativeSetUserAvatar = useNativeSetUserAvatar();
 
   const isLoggedInToAuthoritativeKeyserver = useSelector(
     isLoggedInToKeyserver(authoritativeKeyserverID),
   );
 
   const avatarBeingSetRef = React.useRef(false);
   React.useEffect(() => {
     if (
       !isLoggedInToAuthoritativeKeyserver ||
       currentStep.step !== 'authoritative_keyserver_registration_dispatched' ||
       avatarBeingSetRef.current
     ) {
       return;
     }
     avatarBeingSetRef.current = true;
     const { avatarData, resolve, clearCachedSelections, credentialsToSave } =
       currentStep;
     void (async () => {
       try {
         if (!avatarData) {
           return;
         }
         let updateUserAvatarRequest;
         if (!avatarData.needsUpload) {
           ({ updateUserAvatarRequest } = avatarData);
         } else {
           const { mediaSelection } = avatarData;
           updateUserAvatarRequest = await uploadSelectedMedia(mediaSelection);
           if (!updateUserAvatarRequest) {
             return;
           }
         }
         await nativeSetUserAvatar(updateUserAvatarRequest);
       } finally {
         dispatch({
           type: setDataLoadedActionType,
           payload: {
             dataLoaded: true,
           },
         });
         clearCachedSelections();
         if (credentialsToSave) {
           void setNativeCredentials(credentialsToSave);
         }
         setCurrentStep(inactiveStep);
         avatarBeingSetRef.current = false;
         resolve();
       }
     })();
   }, [
     currentStep,
     isLoggedInToAuthoritativeKeyserver,
     uploadSelectedMedia,
     nativeSetUserAvatar,
     dispatch,
   ]);
 
   return returnedFunc;
 }
 
 export { useRegistrationServerCall };