Firmware Change Update On Htc One X9 -

: Before installing a new ROM, you must perform a "Wipe Data/Factory Reset" to ensure a clean installation. Install the ROM

Firmware updates via fastboot flash require an unlocked bootloader. Firmware Change Update on HTC One X9

He held the buttons. Thirty seconds. Sixty. Ninety. : Before installing a new ROM, you must

to avoid bricking. You can find these by booting into the bootloader. Basic Steps: Read Device Info : Connect your phone to a PC and use the command fastboot getvar all to find your CID and version-main. Download matching firmware Thirty seconds

What is your ? (e.g., European, Asian, AT&T, unbranded) What is your exact CID or Model ID from Download Mode?

Depending on your ultimate goal, choose either Method A (Official Stock Firmware) or Method B (Custom Firmware). Method A: Flashing Official Stock Firmware via RUU

Use this method if you want to install a different regional firmware or a custom ROM (like LineageOS).