Unlock iPhone 4S from network?

I've recently bought an iPhone 5 so I've decided to give my old 4S to a friend as her phone is somewhat knackered.

The 4S is currently locked to the Three (3) network, is there any way to unlock it without asking the network? The phone is jailbroken but I can't use cydia to unlock it as the sim is smaller in the 5. I know I can get a converter for the sim but I'm not sure if the sim would work in it anyway.

IOS 6 Unlock and Untethered Jaiilbreak for iPhone 4S/4, iPhone 5.

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Hi, You can unlock an iPhone 4S locked to 3 network safer and easier using remote unlocking service. You can get the remote unlocking service for an iPhone 4S from http://www.simpleunlocking.com/apple-iphone-4s/rs16wp9/ at low cost. Before that you can visit http://www.mobileunlockguide.com/apple-iphone-4s This site provides free unlocking instruction guide. This will help you to understand unlocking process better.