Unlocking a Nokia N76 can be done for free if you are willing to do a little work. Most people want to rush off and pay for a high priced unlock code for their Nokia phone. The truth is you can usually get a free unlock code for your phone if you are willing to try a few things first. First I would suggest calling up your phone providers support line. Ask them for an unlock code for your Nokia N76. They will need your phones IMEI number in exchange, which you can get by typing *#06# and hitting enter. If your phone provider will not give you one, then I would try reading this unlock guide.
Once you have an unlock code for your Nokia N76, you an begin the unlock instructions that I have provided below. Make sure you only try this once. If it does not work, retrying could just result in permanently locking up your phone! Here are the steps:
How To Unlock A Nokia N76
1. Type #PW+
2. Enter your unlock code
3. Now type +1#
4. Your Nokia phone should say “SIM Restriction Off”
This article provides the original steps if you are still confused. Hopefully this has unlock your Nokia N76 and now you can use your phone with any phone carrier you want!