I've tried everything.
Hello everyone. I bought an iPhone 3GS 16gigs off of craigslist in the US. It came with the slide for emergency screen. Now I didn't want to sign up for an iphone data plan as I am an at&t customer so I used redsn0w to tether hactivate it then used greenp0ison to untether unlock it. But now when I put in my at&t sim card i get the no service message. Is there anyway for me to get my at&t sim card to work on this iPhone without borrowing someone's SIM card who has an iPhone data plan, restoring myself to regular firmware, opening the phone past the slide for emergency screen and unlock but not activate with greenp0ison?
Please answer, I can't find anyone with a 3GS sim card, everyone has the micro ones from the iPhone 4!
Sorry forgot to mention
Version: 4.2.1 (8C148a)
Modem Firmware: 05.15.04
You need to NOT hacktivate to use your phone with AT&T, this means that you need a way to legitimately activate your phone (ie borrow a SIM card) it's okay to use one that has been used with an AT&T iPhone previously then deactivated (for example the old card from someone who upgraded from a previous iPhone model to an iPhone 4)