OTA update with unlocked 9930 ?

Hi guys

I have a little question for you:
I have a Verizon's 9930 BlackBerry which is unlocked with the mep or mep2 (excuse me I'm a newbie with BlackBerrys, this 9930 is my first one) to works with my GSM carrier.
Can I do the lastest OTA update without losing the unlock? 'Cause I don't have the code, I bought my BlackBerry on eBay and if I lose the unlock it would be a real problem.

Thanks your answers!

Once it unlocked its unlocked forever.

Great!
Then I can do the OTA update safely!
Thank you for the answer