We just retired my wife’s iPhone 4 as she finally upgraded to the iPhone 5. After making sure she had backed up every picture of our beautiful daughter, I got in touch with AT&T so they can unlock the phone. As we explained before, the AT&T unlocking process is fairly simple, and before I got off the phone, the Customer Service Rep I was talking to notified me that the phone had been unlocked. Talk about being fast!
Before listing the phone for sale on Craigslist, I wiped it off clean by performing a restore. During that time, I went to Starbucks for my daily dose of overpriced caffeine, and when I came back, my wife’s iPhone was as good as new. I had missed something though. I hadn’t seen the screen telling you that your iPhone has been unlocked, which made me doubt: is this iPhone really factory unlocked? Besides putting a SIM from a different carrier into it, how can you tell the iPhone has been factory unlocked for sure?(...) Read the rest of How to tell if your iPhone is factory unlocked