Unlocking a Motorola Krave ZN4 does not require an unlock code. Since the Motorola Krave ZN4 is offered by Verizon it is a CDMA phone rather then a GSM or SIM based phone. Therefore unlocking this phone is much more difficult and will require some Motorola unlocking software. You can check out this website which sells some unlocking software, but you may be better off paying for a pre-unlocked version of this mobile phone. Otherwise, if you already have your Motorola Krave ZN4, then there are also some professional unlocking vendors out there that can unlock your phone. If you want to learn more about unlocking CDMA phones you should probably read this article first, because unfortunately unlocking a CDMA phone is usually expensive and not worth the time spent into it. Furthermore, if you happen to have a SIM based Motorola Krave ZN4, you can use these free unlock instructions. Good luck!