- First you need to insert non accepted sim card (other than default sim card) in your Alcatel STC X200S modem.
- After that connect your alcatel modem to computer / laptop.
- Now software / dashboard / connection manager of your modem will open
- It will show a box to enter an unlock code ( NCK ) in your modem.
- Generate the unlock code from the below mentioned link and put into your modem.
- Now your modem will be unlocked forever.
- Now you can put any sim card on your Alcatel X200S modem and enjoy surfing the internet.
Online Alcatel Unlock Code Calcuator (Alcatel X200S Modem)