How do I unlock my BlackBerry Q10?

If it is a Verizon Q10, it's already unlocked. If it's a Sprint Q10, it can't be unlocked.

But if it's a Q10 from any other carrier, you need to get an unlock code. You can ask the original carrier (the one that the phone is from) for it. If they won't give you the code for free, get their price and shop around online and at cellphone shops.