If you have an iphone 4 and want an option on another carrier in the us you can use h20 (which most likely resells att access) sims which you can find at best buy.
The sim will activate the iphone 4. You don't even need to jailbreak or unlock to use it. Their data plan blows though. You have to purchase the $49 voice plan then only receive 30mb of data.
https://www.h2owirelessnow.com/pageControl.php?page=index
The sim will activate the iphone 4. You don't even need to jailbreak or unlock to use it. Their data plan blows though. You have to purchase the $49 voice plan then only receive 30mb of data.
https://www.h2owirelessnow.com/pageControl.php?page=index