So I got through with the soft brick , now how do I unlock this phone ? I tried the free method (dialing ... ) doesn't seem to work. Any instructions please?
If you downgraded from 4.3 to 4.1.1, no one has yet posted any report of being able to unlock for free. It would seem you need to be on complete stock 4.1.1, including the bootloader, to use the free unlock method. If you downgraded to 4.1.1 from 4.1.2 or upgraded from an earlier ROM, you should be able to use the free unlock method...
1. Dial *#197328640#
2. Select <1> UMTS
3. Select <1) Debug Screen
4. Select <8> Phone Control
5. Select <6> Network Lock
6. Select <3> Perso SHA256 Off.
7. After you select this option, wait about 30 secs, then press the Menu button and select back
8. Select <4> NW Lock NV Data INITIALLIZ
Wait about 1 minute then power off your phone and reboot. Phone should be unlocked. You wont receive any confirmation it worked after step 8.
If you were already on 4.3, your only likely options for now would be to either contact your carrier for an unlock code, if eligible, or purchase one online via a reliable service.