[hovatek]

The exact technique to enter / boot into Fastboot on an Android phone varies with the type of device. On HTC (for example), you'll first need to enter Hboot . For Intel based Dual OS Tablets, you'll get into DNX (Fastboot) mode . On very few devices,  Volume down + Power button combos will do the trick. You can also get an option to reboot into Bootloader from recovery mode on some Android phones. A generic method (which cuts across most devices) is using ADB.

Steps to boot into Fastboot mode using ADB

Follow the steps below to enter fastboot using ADB

1. Setup ADB-Fastboot drivers using
   
2. Enable USB Debugging on the phone
   
3. Connect the phone to the PC while ON via a USB Cord
   
4. Type the following 2 commands below and press Enter (after each)
   
   Code:

   adb devices
adb reboot-bootloader
   
   If that fails try
   
   
   Code:

   adb shell reboot fastboot
   
   
   
5. The phone should reboot into Bootloader / Fastboot which'll look something like: