Download redsn0w_win_0.9.13dev4 (Google around)
Do a controlled shutdown of your iPhone (“slide to power off”).
Open redsn0w and then click extra,select ipsw for ios 6,
Go back then select Jailbreak
Check only the ‘Downgrade from iPad baseband’
When done, your iPhone will reboot itself
Put your phone in DFU mode and connect it to iTunes.
Select restore, if you have already downloaded the ios 6 ipsw file iTunes will restore the phone else the file will be downloaded and your phone will be restored.
ipsw is here
http://appldnld.apple.com/iOS6/Resto...3_Restore.ipsw
Do a controlled shutdown of your iPhone (“slide to power off”).
Open redsn0w and then click extra,select ipsw for ios 6,
Go back then select Jailbreak
Check only the ‘Downgrade from iPad baseband’
When done, your iPhone will reboot itself
Put your phone in DFU mode and connect it to iTunes.
Select restore, if you have already downloaded the ios 6 ipsw file iTunes will restore the phone else the file will be downloaded and your phone will be restored.
ipsw is here
http://appldnld.apple.com/iOS6/Resto...3_Restore.ipsw