Unlocking Tutorial

Prepare Your IMEI number (from the box or you could dial *#06#)
and that Digi Phone Number (if you are calling using the sim, then its ok)

1- Call Digi Careline - 0162211800
    Input 1 (english) > then input again 1 (for connecting to operator)

2- Tell them you want to unlock your Alcatel phone. They'll ask a few details like name and your IMEI.

3- They will tell you the unlock code. so wrote that down.

4- Change to other sim card. After reboot, the phone will ask for the code. Enter the code.

5- Next dial *#*#3646633#*#*

6- scroll down and click SIMMeLock

7- and follow the step

>>SIM PERSONALIZATION - UNLOCK PERMANENTLY - FINISH

>>NETWORK PERSONALIZATION - UNLOCK PERMANENTLY - FINISH

>>NETWORK SUBSET PERSONALIZATION - UNLOCK PERMANENTLY - FINISH

>>SERVICE PROVIDER PERSONALIZATION - UNLOCK PERMANENTLY - FINISH

8- Done

It never bother to ask me the code again, though it might take a few second longer to connect to your other sim network after reboot. Dont worry, it will connect and no more lock.

p.s: Thanks to ninask and others.