All i know there are 2 method that can help you regain Samsung SMS , one way is you can easy acquired the lost messages from backup ,but it is based on you have made backup or saved the data on other device in before ,
The other way is the scanning the SD card or internal memory for regain lost data on the phone ,
In addition messages, the program still allow restore back lost call number,app, files,videos,music,photos from android ,
How to find back lost messages from Samsung ?