Originally Posted by [GSV]Trig 
Anyone know how to unlock a T610 while were on the subject?
Cable & Server Credit or SP unlock for NCK code.
[
e!] i used the
Total MultiServer cable to do K750i/W800i flashing/unlocking. You can get the old T610 ends for it.
Though as a one off, I presume it might be equally as cheap and certainly less hassle to unlock via Service Provider.