ok here my latest problem i downgraded from the 4.5..3.7 back to the 4.2 and i let it run all night and when i woke up it was finished..... but the error message i got was "you will be unable to set channel or language preferences due to sim problems".... ok i got the obvious about the sim but what would cause this and i know tmo is very sketchy about giving out another one unless you pay 22 dollars but i might need a new one