I just got my iPhone 6S Plus, Sim Free 64 GB, today and when I put in my Metro PCS Sim Card, it said No Service in the status bar. This same sim card has worked flawlessly on my iPhone 5 for the past few years but my 6S Plus is not reading it. I restored the phone from my iPhone 5 backup. Any suggestions? I don't want to exchange it because it has a very good screen and I am hesitant to set it up as New because I'll lose all my Candy Crush progress but if I have to, then I will.