Hello I updated my phones new firmware as soon the new 4.3 released. But since then i have had unexplained crashes... continuously. Especially over night.. Every night when I wake up the phone is off.. LIKE WTF really!!! 2 days in a row i have not been awakened by my needed alarm! So basically how do i downgrade back to the previously firmware.. I just got the 3gs from Att Like 2 weeks ago.. So would firmware would I have and how do I get it back to that. PLease some one assist me.. THANKS!!!