I applied to get my new 7 Plus unlocked from AT&T. They approved the request this morning, but I had a question on the instructions. Here is what they sent... I don't plan on transitioning out of AT&T, I just requested the unlock because I wanted to be sure the phone I bought wasn't stuck on some installment plan and when I travel internationally I can pop in a local carrier SIM. So that said, I currently don't have a non-AT&T SIM Card, so I can't use the non-AT&T SIM instructions. I have an AT&T SIM Card but do I really have to back up, erase, and restore the phone? Could I just pop in the new SIM when I need it? Thanks.