So yesterday I got an used iPhone 3 as a gift, but it was so full of useless crap I simply hit the reset everything options in Settings. Big mistake. After hours of tweaking, I was able to get it up and running, mobile signal and all, but at 3.1.3 version. Since a lot of the apps I wanted required a newer iOS, I just went ahead and used iTunes to flash it to 4.2.1. Another big mistake. Long story short, I'm now at 4.2.1 and stuck at the Emergency Call screen. How can I get out of this mess?