I have a galaxy s4 Verizon. It is rooted. I have had it for about 2 months with no problems until now. I keep having trouble texting. It might just be Facebook messenger but not sure. I send a text and it will say message not sent. I switch to airplane mode for a second then back to regular and it will fine for a while. Eventually it will start doing it again. All the while though, I still can receive messages with no problem. Any help will be appreciated.

 

I think its just FB messenger not the phone. Temporarily froze it so messages go through FB app instead of messenger app and seems to be working fine.