Is your phone jailbroken? Try restoring to stock 4.3.5 first and then shift/Option-Restore to the GM.Sorry. When it starts preparing iPhone for restore, it stops and iTunes says and unknown error has occurred (21). I thought I read somewhere I have to delete a file to fix this.
I can't find my tether hotspot anyone else ? Of course I can't tell how longit's been missing I noticed today not happy pay for it and hardly use tithe one day I need it it's not there
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you are the bestSome people have reported that resetting networks settings fixes this. Just remember you'll delete all of your saved wifi networks.