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11-25-2008, 11:18 AM #1
Guys i need some help asap! Firmware 2.2 question
I'm on AT&T with iPhone 3G 8gb and I recently updated my firmware to 2.2. I'd like to end my AT&T contract and go with T-Mobile and use the sim adaptor that I already have ready to go. All I need is a T-Mo service and the sim card. Now, is it true that these sim adapters don't work on 2.2 firmware. If they don't, is there a way I can go back to 2.1 ??
11-25-2008, 12:02 PM #2
There was a post today on Everythingicafe from someone in Thailand who had gotten his to work with 2.2.
11-25-2008, 12:19 PM #3
As of right now there is no possible way to downgrade back to the 2.1 firmware's baseband. You will either have to buy a new SIM chip after one comes out or contact the manufacturer of yours and see if there's a way to upgrade it with a SIM read/writer.