There are two ways to clear Messenger's cache, depending on whether you're using an Android, or an iPhone or iPad.

Facebook allows you to set Messenger for Android as your default SMS application and use it to send and receive SMS and MMS messages in addition to Facebook conversations.

FACEBOOK Messenger is full of your private communications so it’s only right that the app is kept super secure. Handing over your iPhone or Android device to show a friend something has its p… ...