How to Enter Fastboot Mode in HTC Mostly Phones Like HTC One , HTC One M9 etc

Here is Guide How to Enter Fastboot Mode in Mostly HTC Phones.There are Some Simple Steps Below

• Turn off Completely your phone (You Know How to do so 😃)
• Wait for Some Seconds now Press and Hold POWER BUTTON and VOLUME DOWN BUTTON 
• Release VOLUME DOWN Button When You See Boot-loader Menu
• Now Use VOLUME DOWN Button to go Though Fastboot