Can I unlock my iPhone 4 online? - 1

I'm not currently on contract and the phone is locked to EE, I want to change my Sim card to O2 (GiffGaff), can I unlock the phone online?

I don't believe so. On the Apple website, it says only the phone carrier can unlock phones. As far as jailbreaking it goes, you can jailbreak your iPhone by yourself using evasi0n. There are tutorials on YouTube.

Your best bet is to take it to someone in a shop who will unlock it for you. If you want to do it online, here you go: http://www.iphoneofficialunlock.co.uk/ or http://www.idownloadblog.com/unlock/

Hope this helps you

If you take it to an o2 shop they might be able to unlock it. I think you can unlock it by connecting it to a computer/laptop and unlock it on itunes on your computer/laptop