Downgrade and unlock an iPhone 3GS on firmware 6.1.2 using iPad baseband

We recently purchased a refurbished iPhone 3GS from a supplier to test some features with an iPhone application that we were developing.  The iPhone was in fantastic condition but was locked to the vodafone network and we didn’t have any vodafone sim cards in stock.

Vodafone weren’t particularly helpful in unlocking the phone, so we done a bit of research and unlocked it ourselves.  Please note, the we used the iPAD baseband which is not recommended as it can brick your iPhone 3GS.

Also – do not perform the following steps if your iPhone 3GS was manufactured in late 2011 as it will STOP YOUR PHONE FROM WORKING.

Now – onto the steps we used to unlock the iPhone 3GS on 6.1.2!

Continue reading