diff --git a/app/products/calls/alerts.ts b/app/products/calls/alerts.ts
index 58b0a0938..308118a29 100644
--- a/app/products/calls/alerts.ts
+++ b/app/products/calls/alerts.ts
@@ -102,7 +102,7 @@ export const leaveAndJoinWithAlert = async (
         }
     } catch (error) {
         logError('failed to getServerDatabase in leaveAndJoinWithAlert', error);
-        return;
+        return false;
     }
 
     if (leaveServerUrl && leaveChannelId) {
@@ -119,33 +119,38 @@ export const leaveAndJoinWithAlert = async (
             }, {leaveChannelName, joinChannelName});
         }
 
-        Alert.alert(
-            formatMessage({
-                id: 'mobile.leave_and_join_title',
-                defaultMessage: 'Are you sure you want to switch to a different call?',
-            }),
-            joinMessage,
-            [
-                {
-                    text: formatMessage({
-                        id: 'mobile.post.cancel',
-                        defaultMessage: 'Cancel',
-                    }),
-                    style: 'destructive',
-                },
-                {
-                    text: formatMessage({
-                        id: 'mobile.leave_and_join_confirmation',
-                        defaultMessage: 'Leave & Join',
-                    }),
-                    onPress: () => doJoinCall(joinServerUrl, joinChannelId, joinChannelIsDMorGM, newCall, intl, title, rootId),
-                    style: 'cancel',
-                },
-            ],
-        );
-    } else {
-        doJoinCall(joinServerUrl, joinChannelId, joinChannelIsDMorGM, newCall, intl, title, rootId);
+        const asyncAlert = async () => new Promise((resolve) => {
+            Alert.alert(
+                formatMessage({
+                    id: 'mobile.leave_and_join_title',
+                    defaultMessage: 'Are you sure you want to switch to a different call?',
+                }),
+                joinMessage,
+                [
+                    {
+                        text: formatMessage({
+                            id: 'mobile.post.cancel',
+                            defaultMessage: 'Cancel',
+                        }),
+                        onPress: async () => resolve(false),
+                        style: 'destructive',
+                    },
+                    {
+                        text: formatMessage({
+                            id: 'mobile.leave_and_join_confirmation',
+                            defaultMessage: 'Leave & Join',
+                        }),
+                        onPress: async () => resolve(await doJoinCall(joinServerUrl, joinChannelId, joinChannelIsDMorGM, newCall, intl, title, rootId)),
+                        isPreferred: true,
+                    },
+                ],
+            );
+        });
+
+        return asyncAlert();
     }
+
+    return doJoinCall(joinServerUrl, joinChannelId, joinChannelIsDMorGM, newCall, intl, title, rootId);
 };
 
 const doJoinCall = async (
@@ -166,7 +171,7 @@ const doJoinCall = async (
         user = await getCurrentUser(database);
         if (!user) {
             // This shouldn't happen, so don't bother localizing and displaying an alert.
-            return;
+            return false;
         }
 
         if (newCall) {
@@ -189,12 +194,12 @@ const doJoinCall = async (
                 // continue through and start the call
             } else {
                 contactAdminAlert(intl);
-                return;
+                return false;
             }
         }
     } catch (error) {
         logError('failed to getServerDatabaseAndOperator in doJoinCall', error);
-        return;
+        return false;
     }
 
     recordingAlertLock = false;
@@ -215,12 +220,14 @@ const doJoinCall = async (
     if (res.error) {
         const seeLogs = formatMessage({id: 'mobile.calls_see_logs', defaultMessage: 'See server logs'});
         errorAlert(res.error?.toString() || seeLogs, intl);
-        return;
+        return false;
     }
 
     if (joinChannelIsDMorGM) {
         unmuteMyself();
     }
+
+    return true;
 };
 
 const contactAdminAlert = ({formatMessage}: IntlShape) => {
diff --git a/app/products/calls/components/calls_custom_message/calls_custom_message.tsx b/app/products/calls/components/calls_custom_message/calls_custom_message.tsx
index 63df36327..e233a18cd 100644
--- a/app/products/calls/components/calls_custom_message/calls_custom_message.tsx
+++ b/app/products/calls/components/calls_custom_message/calls_custom_message.tsx
@@ -8,10 +8,12 @@ import {Text, TouchableOpacity, View} from 'react-native';
 
 import {leaveCall} from '@calls/actions';
 import {leaveAndJoinWithAlert, showLimitRestrictedAlert} from '@calls/alerts';
+import {setJoiningChannelId} from '@calls/state';
 import CompassIcon from '@components/compass_icon';
 import FormattedRelativeTime from '@components/formatted_relative_time';
 import FormattedText from '@components/formatted_text';
 import FormattedTime from '@components/formatted_time';
+import Loading from '@components/loading';
 import {useServerUrl} from '@context/server';
 import {useTheme} from '@context/theme';
 import {changeOpacity, makeStyleSheetFromTheme} from '@utils/theme';
@@ -28,6 +30,7 @@ type Props = {
     isMilitaryTime: boolean;
     limitRestrictedInfo?: LimitRestrictedInfo;
     ccChannelId?: string;
+    joiningChannelId: string | null;
 }
 
 const getStyleSheet = makeStyleSheetFromTheme((theme: Theme) => {
@@ -121,23 +124,34 @@ const getStyleSheet = makeStyleSheetFromTheme((theme: Theme) => {
     };
 });
 
-export const CallsCustomMessage = ({post, currentUser, isMilitaryTime, ccChannelId, limitRestrictedInfo}: Props) => {
+export const CallsCustomMessage = ({
+    post,
+    currentUser,
+    isMilitaryTime,
+    ccChannelId,
+    limitRestrictedInfo,
+    joiningChannelId,
+}: Props) => {
     const intl = useIntl();
     const theme = useTheme();
     const style = getStyleSheet(theme);
     const serverUrl = useServerUrl();
     const timezone = getUserTimezone(currentUser);
 
+    const joiningThisCall = Boolean(joiningChannelId === post.channelId);
     const alreadyInTheCall = Boolean(ccChannelId && ccChannelId === post.channelId);
     const isLimitRestricted = Boolean(limitRestrictedInfo?.limitRestricted);
+    const joiningMsg = intl.formatMessage({id: 'mobile.calls_joining', defaultMessage: 'Joining...'});
 
-    const joinHandler = useCallback(() => {
+    const joinHandler = useCallback(async () => {
         if (isLimitRestricted) {
             showLimitRestrictedAlert(limitRestrictedInfo!, intl);
             return;
         }
 
-        leaveAndJoinWithAlert(intl, serverUrl, post.channelId);
+        setJoiningChannelId(post.channelId);
+        await leaveAndJoinWithAlert(intl, serverUrl, post.channelId);
+        setJoiningChannelId(null);
     }, [limitRestrictedInfo, intl, serverUrl, post.channelId]);
 
     const leaveHandler = useCallback(() => {
@@ -227,6 +241,16 @@ export const CallsCustomMessage = ({post, currentUser, isMilitaryTime, ccChannel
         </TouchableOpacity>
     );
 
+    const joiningButton = (
+        <Loading
+            color={theme.buttonColor}
+            size={'small'}
+            footerText={joiningMsg}
+            containerStyle={[style.callButton, style.joinCallButton]}
+            footerTextStyles={style.buttonText}
+        />
+    );
+
     return (
         <>
             {title}
@@ -248,7 +272,7 @@ export const CallsCustomMessage = ({post, currentUser, isMilitaryTime, ccChannel
                         style={style.timeText}
                     />
                 </View>
-                {button}
+                {joiningThisCall ? joiningButton : button}
             </View>
         </>
     );
diff --git a/app/products/calls/components/calls_custom_message/index.ts b/app/products/calls/components/calls_custom_message/index.ts
index 6368f17b6..c50763bf7 100644
--- a/app/products/calls/components/calls_custom_message/index.ts
+++ b/app/products/calls/components/calls_custom_message/index.ts
@@ -7,7 +7,7 @@ import {distinctUntilChanged, switchMap} from 'rxjs/operators';
 
 import {CallsCustomMessage} from '@calls/components/calls_custom_message/calls_custom_message';
 import {observeIsCallLimitRestricted} from '@calls/observers';
-import {observeCurrentCall} from '@calls/state';
+import {observeCurrentCall, observeGlobalCallsState} from '@calls/state';
 import {Preferences} from '@constants';
 import {getDisplayNamePreferenceAsBool} from '@helpers/api/preference';
 import {queryDisplayNamePreferences} from '@queries/servers/preference';
@@ -41,12 +41,17 @@ const enhanced = withObservables(['post'], ({serverUrl, post, database}: OwnProp
         switchMap((call) => of$(call?.channelId)),
         distinctUntilChanged(),
     );
+    const joiningChannelId = observeGlobalCallsState().pipe(
+        switchMap((state) => of$(state?.joiningChannelId)),
+        distinctUntilChanged(),
+    );
 
     return {
         currentUser,
         isMilitaryTime,
         limitRestrictedInfo: observeIsCallLimitRestricted(database, serverUrl, post.channelId),
         ccChannelId,
+        joiningChannelId,
     };
 });
 
diff --git a/app/products/calls/components/channel_info_start/channel_info_start_button.tsx b/app/products/calls/components/channel_info_start/channel_info_start_button.tsx
index 26cd872c9..a79d4146a 100644
--- a/app/products/calls/components/channel_info_start/channel_info_start_button.tsx
+++ b/app/products/calls/components/channel_info_start/channel_info_start_button.tsx
@@ -1,14 +1,18 @@
 // Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
 // See LICENSE.txt for license information.
 
-import React, {useCallback} from 'react';
+import React, {useCallback, useState} from 'react';
 import {useIntl} from 'react-intl';
 
 import {leaveCall} from '@calls/actions';
 import {leaveAndJoinWithAlert, showLimitRestrictedAlert} from '@calls/alerts';
 import {useTryCallsFunction} from '@calls/hooks';
-import OptionBox from '@components/option_box';
+import Loading from '@components/loading';
+import OptionBox, {OPTIONS_HEIGHT} from '@components/option_box';
+import {useTheme} from '@context/theme';
 import {preventDoubleTap} from '@utils/tap';
+import {changeOpacity, makeStyleSheetFromTheme} from '@utils/theme';
+import {typography} from '@utils/typography';
 
 import type {LimitRestrictedInfo} from '@calls/observers';
 
@@ -21,6 +25,27 @@ export interface Props {
     limitRestrictedInfo: LimitRestrictedInfo;
 }
 
+const getStyleSheet = makeStyleSheetFromTheme((theme: Theme) => ({
+    container: {
+        alignItems: 'center',
+        backgroundColor: changeOpacity(theme.buttonBg, 0.08),
+        borderRadius: 4,
+        flex: 1,
+        maxHeight: OPTIONS_HEIGHT,
+        justifyContent: 'center',
+        minWidth: 60,
+        paddingTop: 12,
+        paddingBottom: 10,
+    },
+    text: {
+        color: theme.buttonBg,
+        paddingTop: 3,
+        width: '100%',
+        textAlign: 'center',
+        ...typography('Body', 50, 'SemiBold'),
+    },
+}));
+
 const ChannelInfoStartButton = ({
     serverUrl,
     channelId,
@@ -30,18 +55,30 @@ const ChannelInfoStartButton = ({
     limitRestrictedInfo,
 }: Props) => {
     const intl = useIntl();
+    const theme = useTheme();
+    const styles = getStyleSheet(theme);
     const isLimitRestricted = limitRestrictedInfo.limitRestricted;
+    const [connecting, setConnecting] = useState(false);
+    const [joiningMsg, setJoiningMsg] = useState('');
 
-    const toggleJoinLeave = useCallback(() => {
+    const starting = intl.formatMessage({id: 'mobile.calls_starting', defaultMessage: 'Starting...'});
+    const joining = intl.formatMessage({id: 'mobile.calls_joining', defaultMessage: 'Joining...'});
+
+    const toggleJoinLeave = useCallback(async () => {
         if (alreadyInCall) {
             leaveCall();
+            dismissChannelInfo();
         } else if (isLimitRestricted) {
             showLimitRestrictedAlert(limitRestrictedInfo, intl);
+            dismissChannelInfo();
         } else {
-            leaveAndJoinWithAlert(intl, serverUrl, channelId);
-        }
+            setJoiningMsg(isACallInCurrentChannel ? joining : starting);
+            setConnecting(true);
 
-        dismissChannelInfo();
+            await leaveAndJoinWithAlert(intl, serverUrl, channelId);
+            setConnecting(false);
+            dismissChannelInfo();
+        }
     }, [isLimitRestricted, alreadyInCall, dismissChannelInfo, intl, serverUrl, channelId, isACallInCurrentChannel]);
 
     const [tryJoin, msgPostfix] = useTryCallsFunction(toggleJoinLeave);
@@ -49,14 +86,28 @@ const ChannelInfoStartButton = ({
     const joinText = intl.formatMessage({id: 'mobile.calls_join_call', defaultMessage: 'Join call'});
     const startText = intl.formatMessage({id: 'mobile.calls_start_call', defaultMessage: 'Start call'});
     const leaveText = intl.formatMessage({id: 'mobile.calls_leave_call', defaultMessage: 'Leave call'});
+    const text = isACallInCurrentChannel ? joinText + msgPostfix : startText + msgPostfix;
+    const icon = isACallInCurrentChannel ? 'phone-in-talk' : 'phone';
+
+    if (connecting) {
+        return (
+            <Loading
+                color={theme.buttonBg}
+                size={'small'}
+                footerText={joiningMsg}
+                containerStyle={styles.container}
+                footerTextStyles={styles.text}
+            />
+        );
+    }
 
     return (
         <OptionBox
             onPress={preventDoubleTap(tryJoin)}
-            text={startText + msgPostfix}
-            iconName='phone'
-            activeText={joinText + msgPostfix}
-            activeIconName='phone-in-talk'
+            text={text}
+            iconName={icon}
+            activeText={text}
+            activeIconName={icon}
             isActive={isACallInCurrentChannel}
             destructiveText={leaveText}
             destructiveIconName={'phone-hangup'}
diff --git a/app/products/calls/components/join_call_banner/join_call_banner.tsx b/app/products/calls/components/join_call_banner/join_call_banner.tsx
index b31b78435..e4d694d5b 100644
--- a/app/products/calls/components/join_call_banner/join_call_banner.tsx
+++ b/app/products/calls/components/join_call_banner/join_call_banner.tsx
@@ -7,7 +7,7 @@ import {View, Pressable} from 'react-native';
 
 import {dismissIncomingCall} from '@calls/actions';
 import {leaveAndJoinWithAlert, showLimitRestrictedAlert} from '@calls/alerts';
-import {removeIncomingCall} from '@calls/state';
+import {removeIncomingCall, setJoiningChannelId} from '@calls/state';
 import CompassIcon from '@components/compass_icon';
 import FormattedRelativeTime from '@components/formatted_relative_time';
 import FormattedText from '@components/formatted_text';
@@ -148,7 +148,10 @@ const JoinCallBanner = ({
             showLimitRestrictedAlert(limitRestrictedInfo, intl);
             return;
         }
-        leaveAndJoinWithAlert(intl, serverUrl, channelId);
+
+        setJoiningChannelId(channelId);
+        await leaveAndJoinWithAlert(intl, serverUrl, channelId);
+        setJoiningChannelId(null);
     };
 
     const onDismissPress = () => {
diff --git a/app/products/calls/state/actions.test.ts b/app/products/calls/state/actions.test.ts
index e0c96822a..bd89327c3 100644
--- a/app/products/calls/state/actions.test.ts
+++ b/app/products/calls/state/actions.test.ts
@@ -19,6 +19,7 @@ import {
     setChannelsWithCalls,
     setCurrentCall,
     setHost,
+    setJoiningChannelId,
     setMicPermissionsErrorDismissed,
     setMicPermissionsGranted,
     setRecordingState,
@@ -919,6 +920,7 @@ describe('useCallsState', () => {
         };
         const expectedGlobalState: GlobalCallsState = {
             micPermissionsGranted: true,
+            joiningChannelId: null,
         };
 
         // setup
@@ -955,11 +957,35 @@ describe('useCallsState', () => {
         act(() => {
             myselfLeftCall();
             userLeftCall('server1', 'channel-1', 'mySessionId');
+
+            // reset state to default
+            setMicPermissionsGranted(false);
         });
         assert.deepEqual(result.current[0], initialCallsState);
         assert.deepEqual(result.current[1], null);
     });
 
+    it('joining call', () => {
+        const initialGlobalState = DefaultGlobalCallsState;
+        const expectedGlobalState: GlobalCallsState = {
+            ...DefaultGlobalCallsState,
+            joiningChannelId: 'channel-1',
+        };
+
+        // setup
+        const {result} = renderHook(() => {
+            return [useGlobalCallsState()];
+        });
+
+        // start joining call
+        act(() => setJoiningChannelId('channel-1'));
+        assert.deepEqual(result.current[0], expectedGlobalState);
+
+        // end joining call
+        act(() => setJoiningChannelId(null));
+        assert.deepEqual(result.current[0], initialGlobalState);
+    });
+
     it('CallQuality', async () => {
         const initialCallsState: CallsState = {
             ...DefaultCallsState,
diff --git a/app/products/calls/state/actions.ts b/app/products/calls/state/actions.ts
index 5ce391ec4..43064de98 100644
--- a/app/products/calls/state/actions.ts
+++ b/app/products/calls/state/actions.ts
@@ -564,6 +564,14 @@ export const setSpeakerPhone = (speakerphoneOn: boolean) => {
     }
 };
 
+export const setJoiningChannelId = (joiningChannelId: string | null) => {
+    const globalCallsState = getGlobalCallsState();
+    setGlobalCallsState({
+        ...globalCallsState,
+        joiningChannelId,
+    });
+};
+
 export const setAudioDeviceInfo = (info: AudioDeviceInfo) => {
     const call = getCurrentCall();
     if (call) {
diff --git a/app/products/calls/types/calls.ts b/app/products/calls/types/calls.ts
index 2846ae625..5f455b9d4 100644
--- a/app/products/calls/types/calls.ts
+++ b/app/products/calls/types/calls.ts
@@ -11,10 +11,12 @@ import type UserModel from '@typings/database/models/servers/user';
 
 export type GlobalCallsState = {
     micPermissionsGranted: boolean;
+    joiningChannelId: string | null;
 }
 
 export const DefaultGlobalCallsState: GlobalCallsState = {
     micPermissionsGranted: false,
+    joiningChannelId: null,
 };
 
 export type CallsState = {
diff --git a/assets/base/i18n/en.json b/assets/base/i18n/en.json
index b9a38edad..34a4b89b8 100644
--- a/assets/base/i18n/en.json
+++ b/assets/base/i18n/en.json
@@ -475,6 +475,7 @@
   "mobile.calls_incoming_gm": "<b>{name}</b> is inviting you to a call with  <b>{num, plural, one {# other} other {# others}}</b>",
   "mobile.calls_join": "Join",
   "mobile.calls_join_call": "Join call",
+  "mobile.calls_joining": "Joining...",
   "mobile.calls_lasted": "Lasted {duration}",
   "mobile.calls_leave": "Leave",
   "mobile.calls_leave_call": "Leave call",
@@ -529,6 +530,7 @@
   "mobile.calls_start_call": "Start Call",
   "mobile.calls_start_call_exists": "A call is already ongoing in the channel.",
   "mobile.calls_started_call": "Call started",
+  "mobile.calls_starting": "Starting...",
   "mobile.calls_stop_recording": "Stop Recording",
   "mobile.calls_stop_screenshare": "Stop screen share",
   "mobile.calls_tablet": "Tablet",