I have been having the exact same problem with my iphone 4 and made a thread about it a few weeks ago and every day i check back here to see if somebody posed a solution but no luck

it seems like we have tried everything thrown at us, following every step to the letter and watching many youtube videos doing the same steps every time. ive even jailbroke my roommates iphone 4 minutes after failing countless times on my own. the only difference is his is gsm and mine cdma. anybody know what would happen if i tried the gsm file? we both have 5.0.1 installed and are using the 5.0 ispw and redsnow 9.9b8