K770i Vodafone to T-Mobile

I was given a UK vodafone k770i but wish to debrand it so I can use it with UK t-mobile. It's already unlocked but I really am confused as to which version of the firmware I need to complete the debranding. I've looked on the download page but I don't understand which one I need?

Would appreciate any advice.

Cheers in advance and apologies for any naivety on my part.

D

any gernic or europe 2 one will do small tip u can only flash cid 52 files to a cid 52 phone and cid 53 to a cid 53 phone