Shoutbox

You unlock the phone and not the network. It possible to unlock it, many unlock "calculators" can be found online, just use google. I have a Nokia 7600, which is a 3G phone, but I unlocked it and used my o2 sim in there.

[Edit] after doing a bit of research, its not possible to remotely unlock the 6630 model using the codes as the way the way the the phone handles the phone unlocking has been updated/changed. They new system is called BB5. The only way it is done is via the "cable" method, which mobile phone shops have access to but bear in mind, that not all shops can do it so check with Carphone Warehouse as they are able to do it, but at the current networks request. You could also call up 3 and see if its possible, although they may refuse or charge over £100 for it to be done.