Unlock zte conexis x1 fnb smartfphone to use other sim card

How to unlock ZTE conexis x1 fnb smartfphone to use other sim card
Here is the process to get unlock code
Follow these steps:
visit https://www.unlockninja.com/
Select: Brand Name
Select: Model No and click unlock button
on the next page proceed the steps below:
1) select purchase country and network on which device is locked, your mail
id then make payment
2) We will send you login details(Username and Password) for unlockninja.com at the same moment in your mail to update IMEI No
3) Make login and Update IMEI, we will deliver you the code in The least possible time
Official Zte IMEI Permanent Unlock Important Select the Current Network...