diff --git a/lib/utils/action-utils.js b/lib/utils/action-utils.js
index 629d88242..1d0768953 100644
--- a/lib/utils/action-utils.js
+++ b/lib/utils/action-utils.js
@@ -1,443 +1,447 @@
 // @flow
 
 import _memoize from 'lodash/memoize.js';
 import * as React from 'react';
 import { useSelector, useDispatch } from 'react-redux';
 import { createSelector } from 'reselect';
 
 import callServerEndpoint from './call-server-endpoint.js';
 import type {
   CallServerEndpoint,
   CallServerEndpointOptions,
 } from './call-server-endpoint.js';
 import { getConfig } from './config.js';
 import { serverCallStateSelector } from '../selectors/server-calls.js';
 import {
   logInActionSources,
   type LogInActionSource,
   type LogInStartingPayload,
   type LogInResult,
 } from '../types/account-types.js';
 import type { Endpoint, SocketAPIHandler } from '../types/endpoints.js';
 import type { LoadingOptions, LoadingInfo } from '../types/loading-types.js';
 import type {
   ActionPayload,
   Dispatch,
   PromisedAction,
   BaseAction,
 } from '../types/redux-types.js';
 import type {
   ClientSessionChange,
   PreRequestUserState,
 } from '../types/session-types.js';
 import type { ConnectionStatus } from '../types/socket-types.js';
 import type { CurrentUserInfo } from '../types/user-types.js';
 
 let nextPromiseIndex = 0;
 
 export type ActionTypes<
   STARTED_ACTION_TYPE: string,
   SUCCESS_ACTION_TYPE: string,
   FAILED_ACTION_TYPE: string,
 > = {
   started: STARTED_ACTION_TYPE,
   success: SUCCESS_ACTION_TYPE,
   failed: FAILED_ACTION_TYPE,
 };
 
 function wrapActionPromise<
   STARTED_ACTION_TYPE: string,
   STARTED_PAYLOAD: ActionPayload,
   SUCCESS_ACTION_TYPE: string,
   SUCCESS_PAYLOAD: ActionPayload,
   FAILED_ACTION_TYPE: string,
 >(
   actionTypes: ActionTypes<
     STARTED_ACTION_TYPE,
     SUCCESS_ACTION_TYPE,
     FAILED_ACTION_TYPE,
   >,
   promise: Promise<SUCCESS_PAYLOAD>,
   loadingOptions: ?LoadingOptions,
   startingPayload: ?STARTED_PAYLOAD,
 ): PromisedAction {
   const loadingInfo: LoadingInfo = {
     fetchIndex: nextPromiseIndex++,
     trackMultipleRequests: !!loadingOptions?.trackMultipleRequests,
     customKeyName: loadingOptions?.customKeyName || null,
   };
   return async (dispatch: Dispatch): Promise<void> => {
     const startAction = startingPayload
       ? {
           type: (actionTypes.started: STARTED_ACTION_TYPE),
           loadingInfo,
           payload: (startingPayload: STARTED_PAYLOAD),
         }
       : {
           type: (actionTypes.started: STARTED_ACTION_TYPE),
           loadingInfo,
         };
     dispatch(startAction);
     try {
       const result = await promise;
       dispatch({
         type: (actionTypes.success: SUCCESS_ACTION_TYPE),
         payload: (result: SUCCESS_PAYLOAD),
         loadingInfo,
       });
     } catch (e) {
       console.log(e);
       dispatch({
         type: (actionTypes.failed: FAILED_ACTION_TYPE),
         error: true,
         payload: (e: Error),
         loadingInfo,
       });
     }
   };
 }
 
 export type DispatchActionPromise = <
   STARTED: BaseAction,
   SUCCESS: BaseAction,
   FAILED: BaseAction,
 >(
   actionTypes: ActionTypes<
     $PropertyType<STARTED, 'type'>,
     $PropertyType<SUCCESS, 'type'>,
     $PropertyType<FAILED, 'type'>,
   >,
   promise: Promise<$PropertyType<SUCCESS, 'payload'>>,
   loadingOptions?: LoadingOptions,
   startingPayload?: $PropertyType<STARTED, 'payload'>,
 ) => Promise<void>;
 
 function useDispatchActionPromise(): DispatchActionPromise {
   const dispatch = useDispatch();
   return React.useMemo(() => createDispatchActionPromise(dispatch), [dispatch]);
 }
 
 function createDispatchActionPromise(dispatch: Dispatch) {
   const dispatchActionPromise = function <
     STARTED: BaseAction,
     SUCCESS: BaseAction,
     FAILED: BaseAction,
   >(
     actionTypes: ActionTypes<
       $PropertyType<STARTED, 'type'>,
       $PropertyType<SUCCESS, 'type'>,
       $PropertyType<FAILED, 'type'>,
     >,
     promise: Promise<$PropertyType<SUCCESS, 'payload'>>,
     loadingOptions?: LoadingOptions,
     startingPayload?: $PropertyType<STARTED, 'payload'>,
   ): Promise<void> {
     return dispatch(
       wrapActionPromise(actionTypes, promise, loadingOptions, startingPayload),
     );
   };
   return dispatchActionPromise;
 }
 
 export type DispatchFunctions = {
   +dispatch: Dispatch,
   +dispatchActionPromise: DispatchActionPromise,
 };
 
 let currentlyWaitingForNewCookie = false;
 let serverEndpointCallsWaitingForNewCookie: ((
   callServerEndpoint: ?CallServerEndpoint,
 ) => void)[] = [];
 
 export type DispatchRecoveryAttempt = (
   actionTypes: ActionTypes<'LOG_IN_STARTED', 'LOG_IN_SUCCESS', 'LOG_IN_FAILED'>,
   promise: Promise<LogInResult>,
   startingPayload: LogInStartingPayload,
 ) => Promise<boolean>;
 
 const setNewSessionActionType = 'SET_NEW_SESSION';
 function setNewSession(
   dispatch: Dispatch,
   sessionChange: ClientSessionChange,
   preRequestUserState: ?PreRequestUserState,
   error: ?string,
   logInActionSource: ?LogInActionSource,
 ) {
   dispatch({
     type: setNewSessionActionType,
     payload: { sessionChange, preRequestUserState, error, logInActionSource },
   });
 }
 
 // This function calls resolveInvalidatedCookie, which dispatchs a log in action
 // using the native credentials. Note that we never actually specify a sessionID
 // here, on the assumption that only native clients will call this. (Native
 // clients don't specify a sessionID, indicating to the server that it should
 // use the cookieID as the sessionID.)
 async function fetchNewCookieFromNativeCredentials(
   dispatch: Dispatch,
   cookie: ?string,
   urlPrefix: string,
   logInActionSource: LogInActionSource,
   getInitialNotificationsEncryptedMessage?: () => Promise<string>,
 ): Promise<?ClientSessionChange> {
   const resolveInvalidatedCookie = getConfig().resolveInvalidatedCookie;
   if (!resolveInvalidatedCookie) {
     return null;
   }
   let newSessionChange = null;
   let callServerEndpointCallback = null;
   const boundCallServerEndpoint = async (
     endpoint: Endpoint,
     data: { [key: string]: mixed },
     options?: ?CallServerEndpointOptions,
   ) => {
     const innerBoundSetNewSession = (
       sessionChange: ClientSessionChange,
       error: ?string,
     ) => {
       newSessionChange = sessionChange;
       setNewSession(dispatch, sessionChange, null, error, logInActionSource);
     };
     try {
       const result = await callServerEndpoint(
         cookie,
         innerBoundSetNewSession,
         () => new Promise(r => r(null)),
         () => new Promise(r => r(null)),
         urlPrefix,
         null,
         'disconnected',
         null,
         endpoint,
         data,
         dispatch,
         options,
       );
       if (callServerEndpointCallback) {
         callServerEndpointCallback(!!newSessionChange);
       }
       return result;
     } catch (e) {
       if (callServerEndpointCallback) {
         callServerEndpointCallback(!!newSessionChange);
       }
       throw e;
     }
   };
   const dispatchRecoveryAttempt = (
     actionTypes: ActionTypes<
       'LOG_IN_STARTED',
       'LOG_IN_SUCCESS',
       'LOG_IN_FAILED',
     >,
     promise: Promise<LogInResult>,
     inputStartingPayload: LogInStartingPayload,
   ) => {
     const startingPayload = { ...inputStartingPayload, logInActionSource };
     dispatch(wrapActionPromise(actionTypes, promise, null, startingPayload));
     return new Promise(r => (callServerEndpointCallback = r));
   };
   await resolveInvalidatedCookie(
     boundCallServerEndpoint,
     dispatchRecoveryAttempt,
     logInActionSource,
     getInitialNotificationsEncryptedMessage,
   );
   return newSessionChange;
 }
 
 // Third param is optional and gets called with newCookie if we get a new cookie
 // Necessary to propagate cookie in cookieInvalidationRecovery below
 function bindCookieAndUtilsIntoCallServerEndpoint(
   params: BindServerCallsParams,
 ): CallServerEndpoint {
   const {
     dispatch,
     cookie,
     urlPrefix,
     sessionID,
     currentUserInfo,
     connectionStatus,
   } = params;
   const loggedIn = !!(currentUserInfo && !currentUserInfo.anonymous && true);
   const boundSetNewSession = (
     sessionChange: ClientSessionChange,
     error: ?string,
   ) =>
     setNewSession(
       dispatch,
       sessionChange,
       { currentUserInfo, cookie, sessionID },
       error,
       undefined,
     );
   // This function gets called before callServerEndpoint sends a request,
   // to make sure that we're not in the middle of trying to recover
   // an invalidated cookie
   const waitIfCookieInvalidated = () => {
     if (!getConfig().resolveInvalidatedCookie) {
       // If there is no resolveInvalidatedCookie function, just let the caller
       // callServerEndpoint instance continue
       return Promise.resolve(null);
     }
     if (!currentlyWaitingForNewCookie) {
       // Our cookie seems to be valid
       return Promise.resolve(null);
     }
     // Wait to run until we get our new cookie
     return new Promise(r => serverEndpointCallsWaitingForNewCookie.push(r));
   };
   // This function is a helper for the next function defined below
   const attemptToResolveInvalidation = async (
     sessionChange: ClientSessionChange,
   ) => {
     const newAnonymousCookie = sessionChange.cookie;
     const newSessionChange = await fetchNewCookieFromNativeCredentials(
       dispatch,
       newAnonymousCookie,
       urlPrefix,
       logInActionSources.cookieInvalidationResolutionAttempt,
     );
 
     currentlyWaitingForNewCookie = false;
     const currentWaitingCalls = serverEndpointCallsWaitingForNewCookie;
     serverEndpointCallsWaitingForNewCookie = [];
 
     const newCallServerEndpoint = newSessionChange
       ? bindCookieAndUtilsIntoCallServerEndpoint({
           ...params,
           cookie: newSessionChange.cookie,
           sessionID: newSessionChange.sessionID,
           currentUserInfo: newSessionChange.currentUserInfo,
         })
       : null;
     for (const func of currentWaitingCalls) {
       func(newCallServerEndpoint);
     }
     return newCallServerEndpoint;
   };
   // If this function is called, callServerEndpoint got a response invalidating
   // its cookie, and is wondering if it should just like... give up?
   // Or if there's a chance at redemption
   const cookieInvalidationRecovery = (sessionChange: ClientSessionChange) => {
     if (!getConfig().resolveInvalidatedCookie) {
       // If there is no resolveInvalidatedCookie function, just let the caller
       // callServerEndpoint instance continue
       return Promise.resolve(null);
     }
     if (!loggedIn) {
       // We don't want to attempt any use native credentials of a logged out
       // user to log-in after a cookieInvalidation while logged out
       return Promise.resolve(null);
     }
     if (currentlyWaitingForNewCookie) {
       return new Promise(r => serverEndpointCallsWaitingForNewCookie.push(r));
     }
     currentlyWaitingForNewCookie = true;
     return attemptToResolveInvalidation(sessionChange);
   };
 
   return (
     endpoint: Endpoint,
     data: Object,
     options?: ?CallServerEndpointOptions,
   ) =>
     callServerEndpoint(
       cookie,
       boundSetNewSession,
       waitIfCookieInvalidated,
       cookieInvalidationRecovery,
       urlPrefix,
       sessionID,
       connectionStatus,
       socketAPIHandler,
       endpoint,
       data,
       dispatch,
       options,
     );
 }
 
 export type ActionFunc<F> = (callServerEndpoint: CallServerEndpoint) => F;
 export type BindServerCall = <F>(serverCall: ActionFunc<F>) => F;
 type BindServerCallsParams = {
   dispatch: Dispatch,
   cookie: ?string,
   urlPrefix: string,
   sessionID: ?string,
   currentUserInfo: ?CurrentUserInfo,
   connectionStatus: ConnectionStatus,
 };
 
 // All server calls needs to include some information from the Redux state
 // (namely, the cookie). This information is used deep in the server call,
 // at the point where callServerEndpoint is called. We don't want to bother
 // propagating the cookie (and any future config info that callServerEndpoint
 // needs) through to the server calls so they can pass it to callServerEndpoint.
 // Instead, we "curry" the cookie onto callServerEndpoint within react-redux's
 // connect's mapStateToProps function, and then pass that "bound"
 // callServerEndpoint that no longer needs the cookie as a parameter on to
 // the server call.
 const baseCreateBoundServerCallsSelector = <F>(
   actionFunc: ActionFunc<F>,
 ): (BindServerCallsParams => F) =>
   createSelector(
     (state: BindServerCallsParams) => state.dispatch,
     (state: BindServerCallsParams) => state.cookie,
     (state: BindServerCallsParams) => state.urlPrefix,
     (state: BindServerCallsParams) => state.sessionID,
     (state: BindServerCallsParams) => state.currentUserInfo,
     (state: BindServerCallsParams) => state.connectionStatus,
     (
       dispatch: Dispatch,
       cookie: ?string,
       urlPrefix: string,
       sessionID: ?string,
       currentUserInfo: ?CurrentUserInfo,
       connectionStatus: ConnectionStatus,
     ) => {
       const boundCallServerEndpoint = bindCookieAndUtilsIntoCallServerEndpoint({
         dispatch,
         cookie,
         urlPrefix,
         sessionID,
         currentUserInfo,
         connectionStatus,
       });
       return actionFunc(boundCallServerEndpoint);
     },
   );
 
 type CreateBoundServerCallsSelectorType = <F>(
   ActionFunc<F>,
 ) => BindServerCallsParams => F;
 const createBoundServerCallsSelector: CreateBoundServerCallsSelectorType =
   (_memoize(baseCreateBoundServerCallsSelector): any);
 
-function useServerCall<F>(serverCall: ActionFunc<F>): F {
+function useServerCall<F>(
+  serverCall: ActionFunc<F>,
+  paramOverride?: ?$Shape<BindServerCallsParams>,
+): F {
   const dispatch = useDispatch();
   const serverCallState = useSelector(serverCallStateSelector);
   return React.useMemo(
     () =>
       createBoundServerCallsSelector(serverCall)({
         ...serverCallState,
         dispatch,
+        ...paramOverride,
       }),
-    [serverCall, dispatch, serverCallState],
+    [serverCall, dispatch, serverCallState, paramOverride],
   );
 }
 
 let socketAPIHandler: ?SocketAPIHandler = null;
 function registerActiveSocket(passedSocketAPIHandler: ?SocketAPIHandler) {
   socketAPIHandler = passedSocketAPIHandler;
 }
 
 export {
   useDispatchActionPromise,
   setNewSessionActionType,
   fetchNewCookieFromNativeCredentials,
   createBoundServerCallsSelector,
   registerActiveSocket,
   useServerCall,
 };
diff --git a/native/account/registration/keyserver-selection.react.js b/native/account/registration/keyserver-selection.react.js
index 88eed0971..ffb8326b8 100644
--- a/native/account/registration/keyserver-selection.react.js
+++ b/native/account/registration/keyserver-selection.react.js
@@ -1,187 +1,232 @@
 // @flow
 
 import invariant from 'invariant';
 import * as React from 'react';
 import { Text } from 'react-native';
 
+import {
+  getVersion,
+  getVersionActionTypes,
+} from 'lib/actions/device-actions.js';
+import { createLoadingStatusSelector } from 'lib/selectors/loading-selectors.js';
+import {
+  useServerCall,
+  useDispatchActionPromise,
+} from 'lib/utils/action-utils.js';
+
 import RegistrationButtonContainer from './registration-button-container.react.js';
 import RegistrationButton from './registration-button.react.js';
 import RegistrationContainer from './registration-container.react.js';
 import RegistrationContentContainer from './registration-content-container.react.js';
 import { RegistrationContext } from './registration-context.js';
 import type { RegistrationNavigationProp } from './registration-navigator.react.js';
 import RegistrationTextInput from './registration-text-input.react.js';
 import {
   RegistrationTile,
   RegistrationTileHeader,
 } from './registration-tile.react.js';
 import type { CoolOrNerdMode } from './registration-types.js';
 import CommIcon from '../../components/comm-icon.react.js';
 import {
   type NavigationRoute,
   ConnectEthereumRouteName,
 } from '../../navigation/route-names.js';
+import { useSelector } from '../../redux/redux-utils.js';
 import { useStyles, useColors } from '../../themes/colors.js';
+import { defaultURLPrefix } from '../../utils/url-utils.js';
 
 type Selection = 'ashoat' | 'custom';
 
 export type KeyserverSelectionParams = {
   +userSelections: {
     +coolOrNerdMode: CoolOrNerdMode,
   },
 };
 
+const getVersionLoadingStatusSelector = createLoadingStatusSelector(
+  getVersionActionTypes,
+);
+
 type Props = {
   +navigation: RegistrationNavigationProp<'KeyserverSelection'>,
   +route: NavigationRoute<'KeyserverSelection'>,
 };
 function KeyserverSelection(props: Props): React.Node {
   const registrationContext = React.useContext(RegistrationContext);
   invariant(registrationContext, 'registrationContext should be set');
   const { cachedSelections, setCachedSelections } = registrationContext;
 
   const initialKeyserverUsername = cachedSelections.keyserverUsername;
   const [customKeyserver, setCustomKeyserver] = React.useState(
-    initialKeyserverUsername === 'ashoat' ? '' : initialKeyserverUsername,
+    initialKeyserverUsername === defaultURLPrefix
+      ? ''
+      : initialKeyserverUsername,
   );
   const customKeyserverTextInputRef = React.useRef();
 
   let initialSelection;
-  if (initialKeyserverUsername === 'ashoat') {
+  if (initialKeyserverUsername === defaultURLPrefix) {
     initialSelection = 'ashoat';
   } else if (initialKeyserverUsername) {
     initialSelection = 'custom';
   }
 
   const [currentSelection, setCurrentSelection] =
     React.useState<?Selection>(initialSelection);
   const selectAshoat = React.useCallback(() => {
     setCurrentSelection('ashoat');
     customKeyserverTextInputRef.current?.blur();
   }, []);
   const customKeyserverEmpty = !customKeyserver;
   const selectCustom = React.useCallback(() => {
     setCurrentSelection('custom');
     if (customKeyserverEmpty) {
       customKeyserverTextInputRef.current?.focus();
     }
   }, [customKeyserverEmpty]);
   const onCustomKeyserverFocus = React.useCallback(() => {
     setCurrentSelection('custom');
   }, []);
 
   let keyserverUsername;
   if (currentSelection === 'ashoat') {
-    keyserverUsername = 'ashoat';
+    keyserverUsername = defaultURLPrefix;
   } else if (currentSelection === 'custom' && customKeyserver) {
     keyserverUsername = customKeyserver;
   }
 
-  const buttonState = keyserverUsername ? 'enabled' : 'disabled';
+  const versionLoadingStatus = useSelector(getVersionLoadingStatusSelector);
+  let buttonState = keyserverUsername ? 'enabled' : 'disabled';
+  if (versionLoadingStatus === 'loading') {
+    buttonState = 'loading';
+  }
+
+  const serverCallParamOverride = React.useMemo(
+    () => ({
+      urlPrefix: keyserverUsername,
+    }),
+    [keyserverUsername],
+  );
+  const getVersionCall = useServerCall(getVersion, serverCallParamOverride);
 
+  const dispatchActionPromise = useDispatchActionPromise();
   const { navigate } = props.navigation;
   const { coolOrNerdMode } = props.route.params.userSelections;
-  const onSubmit = React.useCallback(() => {
+  const onSubmit = React.useCallback(async () => {
     if (!keyserverUsername) {
       return;
     }
+
+    const getVersionPromise = getVersionCall();
+    dispatchActionPromise(getVersionActionTypes, getVersionPromise);
+
+    // We don't care about the result; just need to make sure this doesn't throw
+    await getVersionPromise;
+
     setCachedSelections(oldUserSelections => ({
       ...oldUserSelections,
       keyserverUsername,
     }));
     navigate<'ConnectEthereum'>({
       name: ConnectEthereumRouteName,
       params: { userSelections: { coolOrNerdMode, keyserverUsername } },
     });
-  }, [navigate, coolOrNerdMode, keyserverUsername, setCachedSelections]);
+  }, [
+    navigate,
+    coolOrNerdMode,
+    keyserverUsername,
+    setCachedSelections,
+    dispatchActionPromise,
+    getVersionCall,
+  ]);
 
   const styles = useStyles(unboundStyles);
   const colors = useColors();
   return (
     <RegistrationContainer>
       <RegistrationContentContainer>
         <Text style={styles.header}>Select a keyserver to join</Text>
         <Text style={styles.body}>
           Chat communities on Comm are hosted on keyservers, which are
           user-operated backends.
         </Text>
         <Text style={styles.body}>
           Keyservers allow Comm to offer strong privacy guarantees without
           sacrificing functionality.
         </Text>
         <RegistrationTile
           selected={currentSelection === 'ashoat'}
           onSelect={selectAshoat}
         >
           <RegistrationTileHeader>
             <CommIcon
               name="cloud-filled"
               size={16}
               color={colors.panelForegroundLabel}
               style={styles.cloud}
             />
             <Text style={styles.tileTitleText}>ashoat</Text>
           </RegistrationTileHeader>
           <Text style={styles.tileBody}>
             Ashoat is Comm’s founder, and his keyserver currently hosts most of
             the communities on Comm.
           </Text>
         </RegistrationTile>
         <RegistrationTile
           selected={currentSelection === 'custom'}
           onSelect={selectCustom}
         >
           <RegistrationTileHeader>
             <Text style={styles.tileTitleText}>Enter a keyserver</Text>
           </RegistrationTileHeader>
           <RegistrationTextInput
             value={customKeyserver}
             onChangeText={setCustomKeyserver}
             placeholder="Keyserver"
             onFocus={onCustomKeyserverFocus}
             returnKeyType="go"
             onSubmitEditing={onSubmit}
             ref={customKeyserverTextInputRef}
           />
         </RegistrationTile>
       </RegistrationContentContainer>
       <RegistrationButtonContainer>
         <RegistrationButton
           onPress={onSubmit}
           label="Next"
           variant={buttonState}
         />
       </RegistrationButtonContainer>
     </RegistrationContainer>
   );
 }
 
 const unboundStyles = {
   header: {
     fontSize: 24,
     color: 'panelForegroundLabel',
     paddingBottom: 16,
   },
   body: {
     fontFamily: 'Arial',
     fontSize: 15,
     lineHeight: 20,
     color: 'panelForegroundSecondaryLabel',
     paddingBottom: 16,
   },
   tileTitleText: {
     flex: 1,
     fontSize: 18,
     color: 'panelForegroundLabel',
   },
   tileBody: {
     fontFamily: 'Arial',
     fontSize: 13,
     color: 'panelForegroundSecondaryLabel',
   },
   cloud: {
     marginRight: 8,
   },
 };
 
 export default KeyserverSelection;