OMG what a lifesaver! Samsung S3 to Note 4  nothing else worked. Not AT&T's transfer tool  not Samsung's Smart Switch  but this app worked flawlessly the first time without a hitch. Just install the app on both devices and hit """"""""""""""""Backup""""""""""""""""... you'll be prompted what to do from there. Very fast and efficient  backed up all my contacts  phone logs  and SMS messages. Just perfect  I cannot thank you enough for this fantastic tool.""