Hi, my iphone 4 is jailbroken and I decided to update it to the current ios (from 4.x to current). Itunes claims it is 99% on its "updating iphone software" loading bar. The phone itself has a halfway loading bar. I don't want to brick it by pulling the cord, but it is not noticeably loading. The progress bars have been stationary for a good while to the point I'm getting nervous. Any advice?