Do not disconnect the cable until the process completes and the phone reboots. Option 2: Using the SD Card Method ( 2PS6IMG.zip )

The utility will verify your device data and progress through the installation. Your phone screen will display a loading bar.

Boot into TWRP Recovery by choosing from the bootloader menu.

Select and choose your model (or "All Other Supported Models"). Connect your phone to the PC via USB in Fastboot mode.

But what exactly does a "firmware change" mean for the HTC One X9? Is it the same as an Android OS update? How do you perform one without bricking your device? This long-form guide covers everything you need to know.

Download your chosen custom ROM zip file (such as stable ports of LineageOS or optimized AOSP-based ROMs built for the device configuration).

Follow the on-screen instructions. The utility will automatically reboot your phone into the correct bootloader state, verify your device's compatibility, and push the firmware update.

Delete apps or photos to ensure enough space for the new firmware file.