My iPhone 5 keeps trying to send text messages
I just updated my iphone software from 6.? to 7.1.1 i think on the 4/30/14, and now it keeps trying to send text messages. I have no phone credit, so i get a message back from my provider saying I do not have enough credit to send a text message to this number (does not show what number). It happens every 5 to 10 min or so. I signed off of all of my email accounts, turned the phone on and off a few times. The message pops up as soon as the phone turns on. I even turned off iMessage. Does not work. Can anyone tell me why? And more importantly how to stop it? Thanks
iPhone 5, iOS 7.1.1