HI GUYS this is easiest way to unlock your bootloader of X8
WARNING IF YOUR MOBILE MANUFACTURING IS 11W29+
DO NOT TRY TO UNLOCK
UNLOCKING MIGHT RESULT IN HARD BRICK
(TO CHECK MANUFACTURING DATE:ITS BEHIND BATTERY ON MOBILE(not on battery:D)
  NOTE:I am not responsible if this tutorial bricks your lovely phone
STEP 1[tools required]:
1.Flashtool:download
2.S1TOOL:download
3.UNLOCKER:download

STEP 2:

1) Unzip all files
2) POWER OFF Phone
3) Open S1tool
    Click on DO JOB
    Press Back Button on phone
    Connect it to PC.
   Continue pressing back button untill a green LED pops up
4)In S1tool Look For Line "XXXX SIMLOCK CERTIFICATE"


STEP 3:

1) Turn the phone on, Connect it to PC in Debugging mode.
2) if XXXX is "NOT RECOGNIZED" then sorry, it can't be unlocked.
3) if XXXX is SEMC then run "msm7227_semc.cmd"
4) if "XXXX SIMLOCK CERTIFICATE" was not found then run "msm7227_Setool2.cmd"
5) Wait...
6) if "Press any key to continue . . ." is found, press any key.


STEP 4:

1) POWER OFF Phone
2) Open S1tool
     Click on DO JOB
     Press Back button of phone
     Connect it to PC.
3) Look For Line RUNNING S1_EROM VER "x8A029"
4) if x is "r" then it is done, Congrats...
5) if x is "R" then Sorry, Do everything again.

referred from xda