Factory SIM unlock code of HTC 1X is available, means permanent unlocking of HTC 1X is possible using a correct NCK code. We can unlock all HTC easily by IMEI. There is no need to change the firmware to unlock it, if the phone prompts for unlock code after changing the sim card. Unlocking of HTC 1X by code is recommended method as you will not loose the warranty of the phone. It is the fastest and secured method to unlock the phone by IMEI code. Unlocked phone can be used with all networks simcard around the world.
Unlocking of the HTC 1X by code is a recommended method by manufacturer. Since the unlock code comes from manufacturer database, it will unlock your phone 100%.