Just bought an iPhone off craigslist and it was unlocked running firmware 3.3 or something odd. Everything was laggy so I decided to restore & update yesterday. Now I am stuck and It tells me I need a sim card to activate the device. Can some one please tell me how I can get out of that, I need to Unlock the iPhone to get it working on T-Mobile and I want to get out of the Emergency Call screen! LINK ME TO A VIDEO THAT IS THE MOST HELPFUL!! I'm a visual learner If you find a video that is going to show me how to unlock link me to it. Also, why does it say on most of the video If I unlock the iPhone it will not EVER be able to downgrade the firmware or upgrade the firmware via iTunes I would have to use Pwnage tool? Thanks!