How To Unlock Bootloader On Android

*Your internal data will be erase after doing this
  1. Go to: At the bottom click 'Continue' and enter your IMEI (type *#06# to find out), name and email address. 
  2. You should now receive your unique unlock key. Note this down.
  3. Download and Extract fastboot.rar from here and open fastboot folder.
  4. Hold SHIFT and right click on the background of the folder
  5. Select 'Open command window here'
  6. Connect your phone in S1 Fastboot mode (turn phone off, hold [volume up] button and plug in USB Cable to the computer.) Make sure that the blue LED is on after plugging-in!
  7. Now windows ask you to locate the drivers. Locate and install the drivers from here.
  8. Enter fastboot.exe -i 0x0fce getvar version in the command prompt from step 5, and verify that you get a response back (for example "0.3"). This means your phone is connected properly.
  9. Type in fastboot.exe -i 0x0fce oem unlock 0xKEY and replace KEY with the key provided in step 2 and wait.
  10. And voila!!! Your device should now be bootloader unlocked!
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