[SOLVED] iPhone Stuck In Boot Loop

After installing a Cydia app, my phone is stuck in a boot loop. I can only see the silver apple logo which after about 10 minutes or so turn into a silver spinning wheel then reboot again to the silver apple logo. If you update your Cydia regularly, it should installed a Mobile Substrate update which allow you to enter a “safe-mode” environment and uninstall the offending Cydia app. To enter this mode, reboot the phone and press the “Volume Up” button.