I bought a mobile while living in the UK, but now want to be able to put a Vodafone simcard in it to use it here. I have already taken it into one place that unlocks phones, but they said they were unable to do it.

I have a Sony Ericsson Z200 which is currently on the Virgin Mobile network. Does anyone know of anywhere I can get my phone unlocked from this network so that I can use it in NZ?

Thanks!