Alcatel modem company creating many portable modems with different models like X020, X030x, X060s, X070s, X080s, X100x, X200x, X200s, X210x, X210s, X215s, X220l,X225l, X225s, X228l, X230l etc.. STC, CTC etc are using their modems for customizing. But if you buy any of these modems net setter , you cannot use that modem with another SIM card. Just put another SIM card to modem, then modem will ask you an unlock code like RCK, NCK, NSCK or SPCK codes. By entering that unlock code, your modem is free from all locks. Then you can surf internet without any blocks. Some modem will ask two unlock codes like RCK and NCK codes to unlock. Example: Unlock Alcatel STC X230l modem: Ø Connect modem and install built-in software and drivers. Here you need only unlock code to unlock. Using number check on back side of your modem , you can generate unlock code. Ø Go to this site: www. Ø Select you modem model Select X228L instead of x230L. Ø Click on 'Order'.