So I activated my wife's iPhone 7 plus. Turned it on and activated the phone. Work just fine, her number shows up, enter last four and billing zipcode. Weird problem, after I restored from backup, things started going down hill. Had to restart, (power + down volume button) restored from backup again and nothing. AT&T network shows up but no number or service. Restarted and restore as new a phone a few times, reset all settings, reset network settings, etc. After everything, no service. So I decided to pop in her old SIM card from the iPhone 6 and it works. So AT&T somehow killed the new sim card from the iPhone 7.