diff --git a/native/account/registration/account-does-not-exist.react.js b/native/account/registration/account-does-not-exist.react.js
--- a/native/account/registration/account-does-not-exist.react.js
+++ b/native/account/registration/account-does-not-exist.react.js
@@ -11,7 +11,7 @@
 import commSwooshSource from '../../img/comm-swoosh.png';
 import {
   type NavigationRoute,
-  CoolOrNerdModeSelectionRouteName,
+  ConnectEthereumRouteName,
 } from '../../navigation/route-names.js';
 import { useStyles } from '../../themes/colors.js';
 
@@ -22,7 +22,7 @@
 function AccountDoesNotExist(props: Props): React.Node {
   const { navigate } = props.navigation;
   const onSubmit = React.useCallback(() => {
-    navigate(CoolOrNerdModeSelectionRouteName);
+    navigate(ConnectEthereumRouteName);
   }, [navigate]);
 
   const styles = useStyles(unboundStyles);
diff --git a/native/account/registration/avatar-selection.react.js b/native/account/registration/avatar-selection.react.js
--- a/native/account/registration/avatar-selection.react.js
+++ b/native/account/registration/avatar-selection.react.js
@@ -36,8 +36,8 @@
 
 export type AvatarSelectionParams = {
   +userSelections: {
-    +coolOrNerdMode: CoolOrNerdMode,
-    +keyserverURL: string,
+    +coolOrNerdMode?: CoolOrNerdMode,
+    +keyserverURL?: string,
     +accountSelection: AccountSelection,
     +farcasterID: ?string,
   },
diff --git a/native/account/registration/connect-ethereum.react.js b/native/account/registration/connect-ethereum.react.js
--- a/native/account/registration/connect-ethereum.react.js
+++ b/native/account/registration/connect-ethereum.react.js
@@ -30,6 +30,7 @@
 } from '../../navigation/route-names.js';
 import { useSelector } from '../../redux/redux-utils.js';
 import { useStyles } from '../../themes/colors.js';
+import { defaultURLPrefix } from '../../utils/url-utils.js';
 import EthereumLogoDark from '../../vectors/ethereum-logo-dark.react.js';
 import SIWEPanel from '../siwe-panel.react.js';
 
@@ -37,8 +38,8 @@
   exactSearchUserActionTypes,
 );
 
-export type ConnectEthereumParams = {
-  +userSelections: {
+export type ConnectEthereumParams = ?{
+  +userSelections?: {
     +coolOrNerdMode: CoolOrNerdMode,
     +keyserverURL: string,
   },
@@ -52,13 +53,13 @@
 };
 function ConnectEthereum(props: Props): React.Node {
   const { params } = props.route;
-  const { userSelections } = params;
 
   const registrationContext = React.useContext(RegistrationContext);
   invariant(registrationContext, 'registrationContext should be set');
   const { cachedSelections } = registrationContext;
 
-  const isNerdMode = userSelections.coolOrNerdMode === 'nerd';
+  const userSelections = params?.userSelections;
+  const isNerdMode = userSelections?.coolOrNerdMode === 'nerd';
   const styles = useStyles(unboundStyles);
 
   let body;
@@ -127,11 +128,15 @@
   const onSkip = React.useCallback(() => {
     navigate<'ConnectFarcaster'>({
       name: ConnectFarcasterRouteName,
-      params,
+      params: {
+        userSelections: {
+          ...userSelections,
+        },
+      },
     });
-  }, [navigate, params]);
+  }, [navigate, userSelections]);
 
-  const { keyserverURL } = userSelections;
+  const keyserverURL = userSelections?.keyserverURL ?? defaultURLPrefix;
   const serverCallParamOverride = React.useMemo(
     () => ({
       urlPrefix: keyserverURL,
diff --git a/native/account/registration/connect-farcaster.react.js b/native/account/registration/connect-farcaster.react.js
--- a/native/account/registration/connect-farcaster.react.js
+++ b/native/account/registration/connect-farcaster.react.js
@@ -28,8 +28,8 @@
 
 export type ConnectFarcasterParams = {
   +userSelections: {
-    +coolOrNerdMode: CoolOrNerdMode,
-    +keyserverURL: string,
+    +coolOrNerdMode?: CoolOrNerdMode,
+    +keyserverURL?: string,
     +ethereumAccount?: EthereumAccountSelection,
   },
 };
diff --git a/native/account/registration/password-selection.react.js b/native/account/registration/password-selection.react.js
--- a/native/account/registration/password-selection.react.js
+++ b/native/account/registration/password-selection.react.js
@@ -23,8 +23,8 @@
 
 export type PasswordSelectionParams = {
   +userSelections: {
-    +coolOrNerdMode: CoolOrNerdMode,
-    +keyserverURL: string,
+    +coolOrNerdMode?: CoolOrNerdMode,
+    +keyserverURL?: string,
     +farcasterID: ?string,
     +username: string,
   },
diff --git a/native/account/registration/registration-navigator.react.js b/native/account/registration/registration-navigator.react.js
--- a/native/account/registration/registration-navigator.react.js
+++ b/native/account/registration/registration-navigator.react.js
@@ -70,7 +70,10 @@
 // eslint-disable-next-line no-unused-vars
 function RegistrationNavigator(props: Props): React.Node {
   return (
-    <Registration.Navigator screenOptions={screenOptions}>
+    <Registration.Navigator
+      screenOptions={screenOptions}
+      initialRouteName={ConnectEthereumRouteName}
+    >
       <Registration.Screen
         name={CoolOrNerdModeSelectionRouteName}
         component={CoolOrNerdModeSelection}
diff --git a/native/account/registration/registration-server-call.js b/native/account/registration/registration-server-call.js
--- a/native/account/registration/registration-server-call.js
+++ b/native/account/registration/registration-server-call.js
@@ -46,6 +46,7 @@
   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,
@@ -214,11 +215,12 @@
             const {
               accountSelection,
               avatarData,
-              keyserverURL,
+              keyserverURL: passedKeyserverURL,
               farcasterID,
               siweBackupSecrets,
               clearCachedSelections,
             } = input;
+            const keyserverURL = passedKeyserverURL ?? defaultURLPrefix;
             if (
               accountSelection.accountType === 'username' &&
               !usingCommServicesAccessToken
@@ -260,10 +262,12 @@
                 throw e;
               }
             }
-            dispatch({
-              type: setURLPrefix,
-              payload: keyserverURL,
-            });
+            if (passedKeyserverURL) {
+              dispatch({
+                type: setURLPrefix,
+                payload: passedKeyserverURL,
+              });
+            }
             if (farcasterID) {
               dispatch({
                 type: setSyncedMetadataEntryActionType,
diff --git a/native/account/registration/registration-terms.react.js b/native/account/registration/registration-terms.react.js
--- a/native/account/registration/registration-terms.react.js
+++ b/native/account/registration/registration-terms.react.js
@@ -24,8 +24,8 @@
 
 export type RegistrationTermsParams = {
   +userSelections: {
-    +coolOrNerdMode: CoolOrNerdMode,
-    +keyserverURL: string,
+    +coolOrNerdMode?: CoolOrNerdMode,
+    +keyserverURL?: string,
     +farcasterID: ?string,
     +accountSelection: AccountSelection,
     +avatarData: ?AvatarData,
diff --git a/native/account/registration/registration-types.js b/native/account/registration/registration-types.js
--- a/native/account/registration/registration-types.js
+++ b/native/account/registration/registration-types.js
@@ -38,8 +38,8 @@
     };
 
 export type RegistrationServerCallInput = {
-  +coolOrNerdMode: CoolOrNerdMode,
-  +keyserverURL: string,
+  +coolOrNerdMode?: CoolOrNerdMode,
+  +keyserverURL?: string,
   +farcasterID: ?string,
   +accountSelection: AccountSelection,
   +avatarData: ?AvatarData,
diff --git a/native/account/registration/siwe-backup-message-creation.react.js b/native/account/registration/siwe-backup-message-creation.react.js
--- a/native/account/registration/siwe-backup-message-creation.react.js
+++ b/native/account/registration/siwe-backup-message-creation.react.js
@@ -140,8 +140,8 @@
 
 export type CreateSIWEBackupMessageParams = {
   +userSelections: {
-    +coolOrNerdMode: CoolOrNerdMode,
-    +keyserverURL: string,
+    +coolOrNerdMode?: CoolOrNerdMode,
+    +keyserverURL?: string,
     +farcasterID: ?string,
     +accountSelection: AccountSelection,
     +avatarData: ?AvatarData,
diff --git a/native/account/registration/username-selection.react.js b/native/account/registration/username-selection.react.js
--- a/native/account/registration/username-selection.react.js
+++ b/native/account/registration/username-selection.react.js
@@ -37,8 +37,8 @@
 
 export type UsernameSelectionParams = {
   +userSelections: {
-    +coolOrNerdMode: CoolOrNerdMode,
-    +keyserverURL: string,
+    +coolOrNerdMode?: CoolOrNerdMode,
+    +keyserverURL?: string,
     +farcasterID: ?string,
   },
 };