for about 2 days now my droid razr has been acting weird. i cant send texts but i can receive them, phone calls come in with no problem and i can access 3g. i generally only use texting on my phone so you can see this is an issue. when i try to respond to a text, an error message comes up in my notifications saying "message not sent". not sure why this is happening... i have done factory resets & the power/ volume button combo. nothing works