You don't need your sim as long as your phone is already activated.Guys will I need my AT&T SIM for this? I'm at the library with a JB 3GS on T-Mobile!
nope, the switch isn't even there anymore.Try verifying your settings to make sure that the JB didn't merely switch off your Facetime setting. Happened to me once when I wasn't even JB'en but it's just a setting configuration switch.
JB'ing is not detectable unless you tell/show someone that it is.Two questions, have we gotten any official word whether or not jailbreaking on the iP4 is detectable.
Second, I've never had an iP4 before, how does a jailbroken iphone work with itunes, can you still backup and sync as normal.
What about if you want to restore from backups can you still do that?
Also if you decide you want to remove a jailbreak, after you restore your phone, can you still load from a recent backup, or will you lose all your texts and emails and stuff?
So to JB you have to activate with ATT? I have mine on 3.1.2, i want to goto 4.x but i cannot activate because i dont have ATT.You don't need your sim as long as your phone is already activated.
Edit: To clarify, if you're upgrading to 4.0 or 4.0.1 because you're not already on it then yes you will need your sim to activate the phone first