This afternoon I tried to send a text message. When I selected "Send" I saw a red box instead of the usual symbol meaning it is sending. Eventually I got a message saying maximum retries have been reached. I tried making a call and got the "Call Failed" message. I reset the phone and everything worked. A few hours later...the same thing, could not send a text. When my came home she said she could not call me...went straight to voice mail. What's going on?