I'll admit, I recently jailbroke my 3G iPhone but I kept the customization limited. All I acquired was a programming prompt, a game, video camera, and a background wallpaper. I also used the programming prompt to create a custom sms tone and replaced one of the existing ones. Anyway, I received a notification from my phone yesterday that said "No SIM card installed." I never know what that means because it used to happen even before I jailbroke it. I would lose my 3G network access and to fix it, I would always reset my phone (hold down the home and lock buttons at the same time) and that seemed to fix it. After getting the No SIM notification, I figured it best to reset my phone. I did so, and the screen went blank and then showed the silver apple (start up screen) and all seemed normal. What wasn't normal was the fact that about 15 minutes after having done this, the phone was stuck on the start screen. I tried it again. Same result. Thinking it was a time issue, I reset it once more before going to bed thinking that eventually it would go back to normal. I was wrong. I woke up and while getting ready for work, I tried accessing my phone, but it was dead. I tried turning it on (holding the lock button) but it showed a dead battery screen. I plugged it into my computer and saw the charging sign on the phone. I decided to go to work thinking it was back to normal and just leave the phone charging. I got back and, wouldn't you guess, it was still frozen on the start up screen. I've tried a few more times sense then and noticed a pattern: The start up time was regular and would eventually show the loading pinwheel loading (even with nothing wrong the start up takes a while) but after 2 or 3 rotations, freezes. after another 5 or so minutes, the screen goes black and tries again and fails again. It will respond to a hard reset and the power button, but I cannot get the phone to fully turn on. My iPhone is currently turned off, and I would infinitely appreciate any advice or tips to get the phone back in working order.