How to unlock 3 to o2 and keep my 02 number?

I have a o2 sim but my Iphone 4 is on 3 can I transfer my phone to take o2 sim and how much will it cost me

You can the best thing to do is google for phone unlocking services in your local area, That is the easiest thing to do! Be prepared to pay about £50 though as the iphone is a little tricky to unlock and always ends up costing more than other handsets do.

You can unlock your iPhone 4 from 3 network easily by using Remote Unlocking Service. You can get this service at low cost from http://www.wickedunlock.com/apple-iphone-4/rs16wp9/ and unlock it. After unlocking it, you can use freely any GSM network SIM card like O2 network. This is the easy, safe, fast and permanent unlocking service.

Note: The cost depends upon which country network it is locked.

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