Once the messages are moved out from the Facebook app you can only chat through the Messenger app.Your old messages will be moved to the Messenger app and you cannot find them anymore on the Facebook app. Facebook also stated the reason that messaging is faster in Messenger app than on the Facebook app.If you don’t install the Messenger app you can still chat through the Facebook website.The Messenger app allow you to send selfies and make free calls over Wifi.
Recently many people would have heard that messages are moving out of the Facebook app and they would have thought its a rumor,but its an official decision from Facebook. Facebook is sooner going to move the messages out the Facebook app and over to the Messenger app. There will be no more messaging option in the Facebook app, you have to download the Messenger app instead.