I bought the phone from AT&T and then upgraded to a different model discontinuing the use of the old phone. I incorrectly assumed that I could still use my old phone when I inserted a new SIM card. Not! AT&T has it locked.
I've just arrived at London's Heathrow airport and found a vending machine for SIM cards and once again I'm angry that AT&T has my old phone locked.
Can anyone tell me why AT&T does this after I paid for my phone and use another phone on their network? In Greece and England phone providers do not lock the phones that they sell. Why does AT&T?
Is AT&T bilking its customers? My guess is a resounding, YES!