Is there anyway to get a FREE IMEI unlock for iPhone 4s?

Now I have an iPhone 4s running 5.1.1 with firmware 2.0.12 Its locked to orange UK,

Is there Anyway to get a free Imei unlock so I can upgrade to iOS 6, currently using a gevey sim card to use my O2 sim,

Any help would be appreciated, even of it was a software unlock

If you want to update your ios to 6, you can always do it through itunes.
If you want to unlock your phone so that you can use it to different carriers, I don't think there's a free unlock service available. I would suggest that you get an Iphone Factory Unlock service for your iPhone.