Easy way to unlock bootloader is sure - using Flashtool. Before you start you will need:
* PC with Windows XP SP3 or newer
* Working USB cable and charged phone battery
* FlashTool itself
* Rooted Phone
So, After you downloaded and installed all stuff, charged battery and prepared USB cable, go to 'C:/FLashTool/Drivers' folder and install your device's, fastboot and flashmode drivers. Connect your phone to PC and make sure all drivers are working. After that go to phone settings and in development menu enable USB debugging. Then reboot your phone and PC to be sure everything is working and setteled. When you're done, connect phone back to PC & Run FlashTool. In a while you should see that it's identifying your phone. If you see this - then no problem, if no - your drivers were not installed well then. If you're OK at this point then click BLU button, you will see it on panel of FlashTool..and then simply follow the instructions of FlashTool..It will do evrything automatically. By the time device may reboot few times. If you couldn't unlock your bootloader first time for some resons - don't worry, just reboot and try again. So simple!
KINDLY DO NOT MIRROR MY FILES
If you want to unlock your bootloader by official way (totally loosing your warranty), then please got to:
And follow their instructions.