HI I tried updating my iphone 3g to the os4 the other day, but the back up was taking forever and i didnt have time to wait so had to cancel, tried to update agian today and again i left for nearly 3 hours before giving up again. I read on a forum about using the restore function to do the back up instead of update, so i did this, it has worked in much less time, but now the iphone shows a capacity of 6.9GB instead of 8 ? i dont get it where has the GB gone ? Is it corrupt ? Not too fussed as im hoping to upgrade to Iphone 4 anytime soon but just wandered if anyone knew the answer to this.