From my rich experiences. If the problem only occur after your application installation. You will have to manually ssh2 into the folder and delete the newly installed app's folder. You phone should quit from countless logo reload.

Your next question would probably, how can we ssh2 into iphone if our phone havent booted.

iPhone physical system starts before GUI interface starts and apple logo is the first few loading steps of the GUI interface. You can ssh2 into your phone even if the GUI is dead.

Common reason for dead GUI is probably the file permission setting.

Good luck