Help, please? I'm using a first-release Nexus 4, rooted and unlocked (open padlock displayed when phone is powered on). Using the Net10 unlimited monthly plan with an AT&T SIM, naturally I was offended by the AT&T data throttle on an "unlimited" plan. I requested the T-Mobile SIM which arrived, but when inserted into the phone "No SIM card" is displayed. Net10 Support (sigh, after many hours on hold) couldn't resolve the issue other than to send another T-Mobile SIM which has the same problem "No SIM card" when the phone is powered on. Now that I don't have a working phone, I thought I would seek help here before travelling 26 miles to the nearest pay phone at a truck stop and standing uncomfortably for endless hold time, just to have Net10 tell me that the phone must be defective. The old AT&T SIM card is recognized but doesn't have my currently-paid service assigned to it, so no calls or data are possible. What can be done to get this unlocked GSM phone to recognize the Net10 T-Mobile SIM card, please?