It started about 7pm tonight. Nobody was texting back and I couldn't send any texts out. It kept telling me that sending had failed. I didn't do nothing to harm the phone. But when I tried to find out why nobody was texting back, my phone wouldn't let me send any SMS messages. It kept saying sending failed. I reset my phone but that didn't work. I took the SIM out and put it back in, I toom the battery out and left it for a while and then put it back in. I don't know what more I can do, it's frustrating me!