In deleting excess programs, I mistakenly deleted messaging from my apps list. (thought it was a stand alone version) Now I can receive but not send text messages. And get frequent pops ups saying "xxxx running, but can't complete" or something to that effect. I have to choose "cancel" to make it go away. Does that even not trying to text. I can't find anything on the Samsung site about restoring the firmware(?) to the original condition. ???????