Can I unlock my iphone 4s to any network for free?

Well since buying my iPhone 4S a few weeks back, I've come to learn that Orange really isn't the greatest network out there.

I've found Giffgaff offer some great deals, however my phone is currently locked to the Orange Network. Now I know I could phone Orange and have them change it, however a £20 fee plus a 3 month delay for needing to have the phone registered in my name doesn't seem too appealing.

So, what I'm basically looking for is a cheap alternative to a long wait and a pricey fee, can anyone recommend any software/programs which could unlock the phone for me or possibly link me to a site which offers cheap unlock codes?

Any help is much appreciated, thank you.

Added (1). The phone is not and has never been on a contract, nor has it ever been reported stolen etc. It's just a regular Pay as you Go phone!

Added (2). I have checked both Google & Youtube and many other search engines and have yet to find anything which really looks worth purchasing/looking into.

Added (3). I've asked Orange and they've told me personally that there are other ways of unlocking it other than getting Orange to do it.

There are services available on eBay which are different to what Orange offers, however cost considerably more as they don't take as long to do, but the price is ridiculous.

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