Does unlocking affect my AT&T service?
I have an iPhone 3G that's running OS 3.0 and has 04.26.08 modem firmware. I successfully jailbroke it last week using RedSn0w, and I'm quite pleased with it. Now I'm considering unlocking my phone using UltraSn0w. I have no plans on switching from AT&T anytime soon. The main reason I'm thinking of unlocking is because I travel a couple of times a year to The Bahamas, Mexico and The Caribbean and thought about getting a local SIM card to use when I'm there.
I have several questions:
1) Do I leave the AT&T SIM card in the phone while I'm unlocking it?
2) Does unlocking it affect my AT&T service? If so, how?
3)Would AT&T somehow know I had unlocked it, or be "notified" if I put another SIM in it or not?
Thanks for any feedback.