Download and install Phone Transfer on your computer. There are both Win and Mac versions provided for you to choose. After everything get ready, choose "Phone to Phone Transfer" and connect both your Android phones via USB cables.
Note: Phone Transfer is updated frequently so that it would support the latest Android phones like Samsung Galaxy S7/S7 Edge/S6/S6 Edge, Galaxy A9, Note 5/Note 4 and more soon after the release.
Step 2 Scan Files on Android Phone/Tablet
After your Android phones connected, all the files on your Android will be detected and listed according to the data types. You just need to make sure that the source Android phone is listed on the left side and the destination one on the right. Tap "Flip" to change the position if they are not in the right place.
Step 3 Transfer Facebook Chat Messages from Android to Android
After everything settled, you can download and click on "App Data (Root)" in the middle of the interface. Then, the app category will be chosen automatically as well. Now just hit on the "Start Transfer" in the interface and here it is, all the app and app data on your Android are migrated to another one.
Note: Here's an important thing that you should know about. If you want to transfer Facebook photos, messages and more app data on your Android phone, Phone Transfer will root your Android temporarily. After you successfully get your Android app data synced to your new Android, the root will be removed.
As you can see, Phone Transfer only requires 3 simple steps for you to transfer Facebook Messenger messages from Android to Android. With the same steps, you can also transfer Duolingo, Twitter, Skype, and more app together with its app data. If you have any problem using it, please feel free to let us know.