2. Now select your device from drop down if wont know dont worry chose all other supported model last option in drop down menu, now click begin unlock bootloader button, accept terms and conditions yes.
3. Next check two check box and goto to proceed unlock instructions.
4 power off phone vol down and power to goto bootloader mode connect cable.
5. Install fastboot and drivers using htc sync, proceed setup 5.
6. This is main unlock page, Open a command Prompt: Windows: Start->"cmd" Mac: Applications->Utilities->Terminal.app Linux: Terminal.
Type in Command Prompt: fastboot oem get_identifier_token. or just copy paste it in cmd.
7. You will see a long block of text. Copy and paste this text into the the token field below (in the Windows command prompt: Right Click > Mark > highlight the block of text > Right click to copy. Mac users can use cmd-option to mark and select text.)
Note
When copying the token, start with this line:<<<< Identifier Token Start >>>>
And end with this line:
<<<<< Identifier Token End >>>>>
8. Paste this string of text into the token field and hit Submit in order to receive your unlock code binary file. You will receive this information in your email.
10. Now type the following command in Command Prompt and press Enter.fastboot flash unlocktoken Unlock_code.bin.
11. Check your phone. Read on-screen instructions. Press Volume Up to accept and the Power button to confirm.
12. Now your done be careful copy all data coz after unlock bootloader every thing will be flash once and all.