How To Unlock NEC:

Model:  N342i
    1. Turn ON your phone without Sim Card
    2. Enter **00012*Unlock Code# 

Model:  All others NEC
    1. Turn ON your phone without Sim Card
    2. Enter #7320*Unlock Code# 

Model:  Old NEC
    1. Turn ON your phone without Sim Card
    2. Enter #3210*Unlock Code#
    3. Press Call Button