Unlocking K610

Hi,

I'm very new to this, I want to unlock K610 or make it accept my existing seem card which is virgin pay as you go UK. After spending couple of days I have managed to flash the phone using JDflasher however it does not accept my sim. I know that patching isn't available with cid53 yet but what I want to know is there particular virsion of firmware which I can use it to flash my phone in order for it to accept my sim.

There seem to be so many firmwares with lot of different regions and I'd like to know which one to use.

Thanks