Okay i have an iphone 3gs that was running 3.1.2 unlocked earlier with tmobile. It was working fine. today i A.) reset network settings to get wifi back working and it was fine (didnt reboot though) and B.) installed winterboard. Then i pushed reboot and it hasnt booted back up since. Its in a continuous apple loop.
P.S. i pushed the make my life easier button on cydia but it just said pending since i've had the phone (about two days)