How Do I unlock my C600 Phone?

[Guest bill5ter]

HI guys, im new to this site anbd im looking for some help on unlocking my Orange C600.

When I say "unlock" - I wany to be able to put any SIM I choose in it, not just the Orange one that came with it. Im aware that I have to "appunlock" the phone and then run another utility - but I cant find any anywhere ( for free anyway).

I can find websites that want to charge me £40 or so.....but I thought id ask you guys first.

Many thanks,

bill5ter