Disabling Auto Retrieve MMS will partially mitigate this vulnerability ahead of the official patch release.
All MMS media files will require a click in order to be viewed, but disabling this feature will prevent an attack from automatically executing on your phone. Turning off this feature does not fix the exploit entirely. So long as the bug exists, your Android device remains vulnerable and can be hacked if a malformed media file is downloaded by clicking on it. This vulnerability will not be completely fixed until a patch is released for your device, but this intermediate step can help mitigate the threat in the meantime.
Hereâ€™s how to protect your phone from the Stagefright bug if youâ€™re using Google Messenger (the default SMS client for Android 5.0+):