Hi, basically my iPhone's battery was losing 1% per minute, but while on standby it was great. So after some research i saw that if u uninstall mobile substrate and install it again this may fix battery issues. So i uninstalled it through cydia and when i rebooted my device and use blackra1n to start it up (as it is a tethered 3.1.2 jailbreak with new bootrom 3gs) geohots pic comes up for about 45 seconds and then it turns off. I have tried booting it up 10 times and it's still not starting up. Please help, what can i do?