Need help unlocking

[Dan555]

Hi, sorry if this has been posted here before.. I've been searching for a solution for a while now!

I am trying to unlock an iPhone 4 on firmware 4.3.5 to any network, is this possible? It is currently on Orange (UK) and I have an o2 sim card.

I have read about downgrading to 4.3.3 but I'm not sure if this can be done without something being installed through Cydia?

Thank in advance peeps!

[xtacy]

Downgrading won't help and downgrading is not possible without shsh blobs saved.
This is what you need :- GEVEY Ultra unlock iPhone 4 iOS 4.0, 4.1, 4.2.1, 4.3.1, 4.3, 4.3.2, 4.3.3 baseband 1.59, 2.10, 3.10.1, 4.10.1

[i.Annie]

/thread moved to appropriate section

[Mes]

As xtacy mentioned, SHSH blobs are required to restore an old iOS version. Do you have any?

...peeps!

What is a peep ?!?!