Sim Unlock for C600

[Guest Ti22]

Hey guys,

I am about to buy 2 of the SPV C600, one for my dad and one for a friend (my dad uses the C500 now and he says its the best phone he's ever used and he wants the C600 now cuz the C500 is wearing out)

anyway I am taking it back to Thailand so I'd like to use a Thai Sim with it,

I've once unlocked the C500 however i doupt C600 uses the same procedure,

is there a way you guys can show me the way to unlocking this phone?