Mine is a ZTE older model won't read Sim card. AT&T was to send me a new one but haven't received it can't get customer support to help me they won't unlock the phone so I can use a different carrier. Now someone got into my phone encrypted it. Also I have no data settings. 3 months in a row AT&T has done nothing and the problems ate getting worse . I have never seen such poor trained support. I can't use the phone no one can hear me . Any suggestions?

I can not get my zte to detect my sim card it was fine few days ago AT&T was suppose to send me a new one in the mail but haven't received it and having difficulty with their customer service support they won't call me back also I can't make calls no one can hear me on the other end and the data is wiped out in settings I have no mobile data switch to turn on in settings what should I do. Also it looks like my phone has been encrypted I don't know what that