Updating an unlocked iphone
To get around this issue you need to use a Jailbreaking tool which supports custom IPSW creation.
Jailbreaking tools that feature custom IPSW creation range from the Pwnage Tool to Sn0w Breeze.
It is no question that the i OS 5 firmware packs some great new functionality for your i Phone.
Thus, in this how to guide from i you will learn how to update to the i OS 5 firmware without updating your baseband so you can then unlock your i Phone using Ultra Sn0w once i Phone is Jailbroken.
From this screen you will need to hold the option key down and click the Restore Button.
A new window will now pop up asking you to select the firmware file you wish the restore to.
Read this instructions and click the Next Button to actually begin putting your i Phone into Pwned DFU mode.
Step 6) – Once your i Phone is in Pwned DFU mode i Tunes should launch and tell you your i Phone is in Recovery Mode.