Attention no service and mobile network not available
About 2 hours ago, my phone was blinking and saying attention no service (there were no bars at the time). Then when all the bars were full again, it is still blinking and saying attention no service. I can't make/receive calls or texts. I have turned the phone off, took out sim card/put back in and restarted it. I was still getting the same problem. It will switch between no bars to full bars but blinks and says attention no service the whole time. When it actually does stop blinking and no longer says attention no service and the bars are full, when I try to make a phone call it says mobile network not available. It just keeps going back and forth with all these steps. What is wrong with my phone and how can I fix it? Or is it an issue with AT&T? I have to have a working cell phone before work tomorrow (well, actually later this morning now). Help! My phone is a ZTE Maven.