I just got my Droid Turbo 2 yesterday and have been having the same issue quite a few times. The second I send a text to someone, I'll get a message that "messaging has stopped" and it force closes the app. When I reopen it, the text I was sending just says "sending" and never actually goes through. I have to delete it and resend it, hoping it doesn't go through twice. Anyone else have this issue? Any solution? Thanks for your help!
