The bootloader version; you can only flash a version that is equal to or higher than your current one unless your device is S-OFF.
This is a security code that must match the firmware. Download EASY FIRMWARE HTC FLASH rar
The device will show a progress bar. Once finished, use fastboot reboot to restart the system. Alternative: SD Card Method The bootloader version; you can only flash a
Rename the firmware file to a specific naming convention (e.g., 0PJAIMG.zip for M9). Copy the file to the root of your SD card. The bootloader version
Before downloading or using any firmware, you must identify your specific device details to avoid bricking: