baseband problems

I put a custom ROM, Gingerbread, on an old LG GW620 phone as my usual phone screen broke(really!).



Now there is a problem with the wifi and calls as the baseband isn't quite what it should be. I know the phone is a V20G and that there is a baseband particular to the UK that should solve all my problems.



Problem is this is an older phone and I don't know how to determine which baseband I need. The stock baseband is gsm.version.baseband amss6385.



Any thoughts on how I can proveed?



Thanks in advance.



LFD