Besides using an iPad baseband which seems to be iffy on reliability at best, is there another way to unlock a 3GS Version 5.0.1 (9A405), firmware 5.16.05 iphone? iphone has been jailbroken with redsn0w 9.9b2 and tried to unlock using ultrasn0w 1.2.4 , but a 'No Service' is displayed when non-AT&T sim card is placed in the phone. I know that 1.2.4 supports only basebands 5.11.07, 5.12.01, 5.13.04 and 6.15.00 but how often are ultrasn0w updates released? Or is there any other software recommended to perform the unlock process? Thanks in advance!