Install the latest HTC USB Drivers and HTC Sync Manager on your computer if you are performing a manual update. 📶 Method 1: Official OTA Update (Easiest)

Wipe the cache partition from the recovery menu and attempt the flash again.

Rename the downloaded firmware ZIP file to 2PS5IMG.zip .

Updating the firmware on your HTC One X9 is the most effective way to improve system stability, enhance security, and resolve persistent software bugs. Whether you are looking to install the latest official OTA (Over-The-Air) update or need to manually flash a firmware ZIP file to recover a bricked device, this guide covers the essential methods to keep your device running smoothly. 🛠️ Preparation and Safety Measures

If your phone is stuck in a boot loop or the OTA fails, the official HTC ROM Update Utility (RUU) is the best recovery tool. Steps to Follow:

For advanced users, you can flash firmware directly from the device's bootloader using an SD card.

This is the standard method provided by HTC. It is safe and does not void your warranty. Connect to a stable . Go to Settings on your HTC One X9. Scroll down and tap on About . Select Software Updates . Tap Check Now .

Turn off your phone. Press and hold Volume Down + Power to enter the bootloader. Select FASTBOOT . Connect to PC: Plug your phone into your computer.