A friend of mine gave me an iPhone 3GS 3.1 firmware, 05.11.07 baseband OTB bought from US AT&T with no contract and brought it here in Saudi Arabia. I jailbroken it using Blackra1n on Windows Vista & iTunes 9.0. Without paying attention to Dev Team warning and the rest of the posts here that BB 05.11.07 cannot be unlocked at the moment. Maybe my patient waiting to unlock my iPhone 3GS has drained and needed badly, so I went ahead to unlock it using Purplera1n on Cydia. It scared the hell of me when my iPhone 3GS went black, so I immediate put it on recovery mode to restore to its original software + the update on Apple server. Sadly I don’t have AT&T sim and I’m not planning to get one since I work here in Saudi Arabia. I completed the restore and I was asked to ACTIVATE my iPhone by inserting the valid AT&T sim.
My question is, how can I activate my iPhone 3GS without using AT&T sim?