diff --git a/css/premeeting/_prejoin.scss b/css/premeeting/_prejoin.scss
index 575f0dae8d..32992da466 100644
--- a/css/premeeting/_prejoin.scss
+++ b/css/premeeting/_prejoin.scss
@@ -50,7 +50,7 @@
         * Override default InlineDialog behaviour, since it does not play nicely with relative widths
         */
         & > div:nth-child(2) {
-            background: #fff;
+            background: #E0E0E0;
             padding: 0;
             position: absolute !important;
             width: 100%;
diff --git a/react/features/base/ui/components/types.ts b/react/features/base/ui/components/types.ts
index 61875cc51e..e5fd8dbc7d 100644
--- a/react/features/base/ui/components/types.ts
+++ b/react/features/base/ui/components/types.ts
@@ -34,6 +34,11 @@ export interface IButtonProps {
      */
     onClick?: (e?: React.MouseEvent<HTMLButtonElement> | GestureResponderEvent) => void;
 
+    /**
+     * Key press callback.
+     */
+    onKeyPress?: (e?: React.KeyboardEvent<HTMLButtonElement>) => void;
+
     /**
      * The type of button to be displayed.
      */
diff --git a/react/features/base/ui/components/web/Button.tsx b/react/features/base/ui/components/web/Button.tsx
index 5502b20dcb..e00bfa412a 100644
--- a/react/features/base/ui/components/web/Button.tsx
+++ b/react/features/base/ui/components/web/Button.tsx
@@ -187,6 +187,7 @@ const Button = React.forwardRef<any, any>(({
     label,
     labelKey,
     onClick = () => null,
+    onKeyPress = () => null,
     size = 'medium',
     testId,
     type = BUTTON_TYPES.PRIMARY
@@ -206,6 +207,7 @@ const Button = React.forwardRef<any, any>(({
             disabled = { disabled }
             { ...(id ? { id } : {}) }
             onClick = { onClick }
+            onKeyPress = { onKeyPress }
             ref = { ref }
             title = { accessibilityLabel }
             type = { isSubmit ? 'submit' : 'button' }>
diff --git a/react/features/prejoin/components/web/DropdownButton.tsx b/react/features/prejoin/components/web/DropdownButton.tsx
deleted file mode 100644
index 0bc2fa3910..0000000000
--- a/react/features/prejoin/components/web/DropdownButton.tsx
+++ /dev/null
@@ -1,95 +0,0 @@
-import React from 'react';
-import { makeStyles } from 'tss-react/mui';
-
-import Icon from '../../../base/icons/components/Icon';
-
-interface IProps {
-
-    /**
-     * Attribute used in automated testing.
-     */
-    dataTestId: string;
-
-    /**
-     * The button's icon.
-     */
-    icon: Function;
-
-    /**
-     * The button's label.
-     */
-    label: string;
-
-    /**
-     * Function to be called when button is clicked.
-     */
-    onButtonClick: (e?: React.MouseEvent) => void;
-
-    /**
-     * Function to be called on key pressed.
-     */
-    onKeyPressed: (e?: React.KeyboardEvent) => void;
-}
-
-
-const useStyles = makeStyles()(theme => {
-    return {
-        prejoinPreviewDropdownBtn: {
-            alignItems: 'center',
-            color: '#1C2025',
-            cursor: 'pointer',
-            display: 'flex',
-            height: 40,
-            fontSize: 15,
-            lineHeight: '24px',
-            padding: '0 16px', // @ts-ignore
-            backgroundColor: theme.palette.field02,
-
-            '&:hover': { // @ts-ignore
-                backgroundColor: theme.palette.field02Hover
-            }
-        },
-        prejoinPreviewDropdownIcon: {
-            display: 'inline-block',
-            marginRight: 16,
-
-            '& > svg': {
-                fill: '#1C2025'
-            }
-        }
-    };
-});
-
-/**
- * Buttons used for pre meeting actions.
- *
- * @returns {ReactElement}
- */
-const DropdownButton = ({
-    dataTestId,
-    icon,
-    onButtonClick,
-    onKeyPressed,
-    label
-}: IProps) => {
-    const { classes } = useStyles();
-
-    return (
-        <div
-            className = { classes.prejoinPreviewDropdownBtn }
-            data-testid = { dataTestId }
-            onClick = { onButtonClick }
-            onKeyPress = { onKeyPressed }
-            role = 'button'
-            tabIndex = { 0 }>
-            <Icon
-                className = { classes.prejoinPreviewDropdownIcon }
-                color = '#1C2025'
-                size = { 24 }
-                src = { icon } />
-            {label}
-        </div>
-    );
-};
-
-export default DropdownButton;
diff --git a/react/features/prejoin/components/web/Prejoin.js b/react/features/prejoin/components/web/Prejoin.js
index 60cd507838..f0b4571657 100644
--- a/react/features/prejoin/components/web/Prejoin.js
+++ b/react/features/prejoin/components/web/Prejoin.js
@@ -13,6 +13,8 @@ import { ActionButton, InputField, PreMeetingScreen } from '../../../base/premee
 import { connect } from '../../../base/redux';
 import { getDisplayName, updateSettings } from '../../../base/settings';
 import { getLocalJitsiVideoTrack } from '../../../base/tracks';
+import Button from '../../../base/ui/components/web/Button';
+import { BUTTON_TYPES } from '../../../base/ui/constants.any';
 import {
     joinConference as joinConferenceAction,
     joinConferenceWithoutAudio as joinConferenceWithoutAudioAction,
@@ -26,7 +28,6 @@ import {
     isPrejoinDisplayNameVisible
 } from '../../functions';
 
-import DropdownButton from './DropdownButton';
 import JoinByPhoneDialog from './dialogs/JoinByPhoneDialog';
 
 type Props = {
@@ -56,6 +57,11 @@ type Props = {
      */
     joinConferenceWithoutAudio: Function,
 
+    /**
+     * Whether conference join is in progress.
+     */
+    joiningInProgress: boolean,
+
     /**
      * The name of the user that is about to join.
      */
@@ -114,11 +120,6 @@ type Props = {
 
 type State = {
 
-    /**
-     * Flag controlling the visibility of the error label.
-     */
-    showError: boolean,
-
     /**
      * Flag controlling the visibility of the 'join by phone' buttons.
      */
@@ -138,7 +139,6 @@ class Prejoin extends Component<Props, State> {
         super(props);
 
         this.state = {
-            showError: false,
             showJoinByPhoneButtons: false
         };
 
@@ -165,14 +165,8 @@ class Prejoin extends Component<Props, State> {
      */
     _onJoinButtonClick() {
         if (this.props.showErrorOnJoin) {
-            this.setState({
-                showError: true
-            });
-
             return;
         }
-
-        this.setState({ showError: false });
         this.props.joinConference();
     }
 
@@ -304,20 +298,20 @@ class Prejoin extends Component<Props, State> {
 
         const noAudio = {
             key: 'no-audio',
-            dataTestId: 'prejoin.joinWithoutAudio',
+            testId: 'prejoin.joinWithoutAudio',
             icon: IconVolumeOff,
             label: t('prejoin.joinWithoutAudio'),
-            onButtonClick: joinConferenceWithoutAudio,
-            onKeyPressed: this._onJoinConferenceWithoutAudioKeyPress
+            onClick: joinConferenceWithoutAudio,
+            onKeyPress: this._onJoinConferenceWithoutAudioKeyPress
         };
 
         const byPhone = {
             key: 'by-phone',
-            dataTestId: 'prejoin.joinByPhone',
+            testId: 'prejoin.joinByPhone',
             icon: IconPhoneRinging,
             label: t('prejoin.joinAudioByPhone'),
-            onButtonClick: this._showDialog,
-            onKeyPressed: this._showDialogKeyPress
+            onClick: this._showDialog,
+            onKeyPress: this._showDialogKeyPress
         };
 
         return {
@@ -338,12 +332,14 @@ class Prejoin extends Component<Props, State> {
             hasJoinByPhoneButton,
             joinConference,
             joinConferenceWithoutAudio,
+            joiningInProgress,
             name,
             participantId,
             prejoinConfig,
             readOnlyName,
             showCameraPreview,
             showDialog,
+            showErrorOnJoin,
             t,
             videoTrack
         } = this.props;
@@ -359,7 +355,7 @@ class Prejoin extends Component<Props, State> {
             extraButtonsToRender = extraButtonsToRender.filter((btn: Object) => btn.key !== 'by-phone');
         }
         const hasExtraJoinButtons = Boolean(extraButtonsToRender.length);
-        const { showJoinByPhoneButtons, showError } = this.state;
+        const { showJoinByPhoneButtons } = this.state;
 
         return (
             <PreMeetingScreen
@@ -373,8 +369,8 @@ class Prejoin extends Component<Props, State> {
                     {this.showDisplayNameField ? (<InputField
                         autoComplete = { 'name' }
                         autoFocus = { true }
-                        className = { showError ? 'error' : '' }
-                        hasError = { showError }
+                        className = { showErrorOnJoin ? 'error' : '' }
+                        hasError = { showErrorOnJoin }
                         onChange = { _setName }
                         onSubmit = { joinConference }
                         placeHolder = { t('dialog.enterDisplayName') }
@@ -391,7 +387,7 @@ class Prejoin extends Component<Props, State> {
                         </div>
                     )}
 
-                    {showError && <div
+                    {showErrorOnJoin && <div
                         className = 'prejoin-error'
                         data-testid = 'prejoin.errorMessage'>{t('prejoin.errorMissingName')}</div>}
 
@@ -399,8 +395,11 @@ class Prejoin extends Component<Props, State> {
                         <InlineDialog
                             content = { hasExtraJoinButtons && <div className = 'prejoin-preview-dropdown-btns'>
                                 {extraButtonsToRender.map(({ key, ...rest }: Object) => (
-                                    <DropdownButton
+                                    <Button
+                                        disabled = { joiningInProgress }
+                                        fullWidth = { true }
                                         key = { key }
+                                        type = { BUTTON_TYPES.SECONDARY }
                                         { ...rest } />
                                 ))}
                             </div> }
@@ -411,6 +410,7 @@ class Prejoin extends Component<Props, State> {
                                 ariaDropDownLabel = { t('prejoin.joinWithoutAudio') }
                                 ariaLabel = { t('prejoin.joinMeeting') }
                                 ariaPressed = { showJoinByPhoneButtons }
+                                disabled = { joiningInProgress }
                                 hasOptions = { hasExtraJoinButtons }
                                 onClick = { _onJoinButtonClick }
                                 onKeyPress = { _onJoinKeyPress }
@@ -444,11 +444,13 @@ function mapStateToProps(state): Object {
     const name = getDisplayName(state);
     const showErrorOnJoin = isDisplayNameRequired(state) && !name;
     const { id: participantId } = getLocalParticipant(state);
+    const { joiningInProgress } = state['features/prejoin'];
 
     return {
         canEditDisplayName: isPrejoinDisplayNameVisible(state),
         deviceStatusVisible: isDeviceStatusVisible(state),
         hasJoinByPhoneButton: isJoinByPhoneButtonVisible(state),
+        joiningInProgress,
         name,
         participantId,
         prejoinConfig: state['features/base/config'].prejoinConfig,