iphone 4 keeps rebooting after 5.0.1 jailbreak

[phryedrice]

is anyone else having this problem? when i try to restore, i get an itunes error saying "Iphone could not be restored. An unknown error has occurred (21)."

please help

 

[electron73]

is anyone else having this problem? when i try to restore, i get an itunes error saying "Iphone could not be restored. An unknown error has occurred (21)."

please help

Had the same thing today, found out was a result of previous jailbreak and stuff. Go into DFU mode (google for procedure) and then do a "shift-restore" from within iTunes to a fresh 5.0.1 and voila! It should work like a charm (it did here!)

 

[nwlondonlad]

I had this problem last night for hrs. I was using a pc. The only thing that worked for me was doing the restore on my Mac.

 

[phryedrice]

ya i had to use my brother's mac. did you also jailbreak your phone on the mac too?