I have a Nokia 6303 that is currently locked to the Tesco network, however, I have seen a Pay Monthly plan on 3 that I like the look of. I need to get my phone unlocked, but the Nokia 6303 does not have 3G, which has something to do with network connections. I do not understand much on this subject, so can somebody please explain about whether having 3G enabled on a phone will affect its unlock-ability on particular networks? Thank you