BB 8700 Reset Question.

I would like to clear the contacts from a used 8700c I bought.
I've been reading the other threads about how to reset the phone by locking it out and all, I have unlocked (to use internationally) the phone already.
Question is: if I reset it useing the 10 time wrong code process will it still be unlocked or will I have to buy another unlock code?

Thanks a Million!

It will forever more be unlocked for use internationally.

Thanks a Million!!

That worked great! there was over 4200 contacts in that silly phone!!!!