For power users wanting a newer version of Android (like Android 11 or 12 via LineageOS), a custom ROM is the way to go. Note that this voids your warranty and carries a risk of data loss. Unlock the Bootloader
Below is a complete, ready-to-publish blog post sharing how to update the firmware on the HTC One X9. How to Update the Firmware on Your HTC One X9 Firmware Change Update on HTC One X9
Reality check: HTC discontinued support for the One X9 around 2018. Most users will not receive OTA firmware updates anymore. For power users wanting a newer version of
Refreshing Your HTC One X9: A Guide to Firmware Changes and Updates How to Update the Firmware on Your HTC
Before starting, ensure the device is connected to a stable Wi-Fi network to avoid heavy data charges and that the battery is sufficiently charged (typically over 35%). Checking for Updates: Users can manually trigger a search by navigating to Settings > About > Software updates and selecting Installation:
This is the safest method to ensure your device has the latest official features and security patches. Check for Updates Software updates Manual Check to see if a newer version is available from HTC. : If an update appears, tap . It is highly recommended to use a Wi-Fi connection to avoid high data charges. : Once downloaded, select Install now . Your phone will restart to apply the changes. 2. Manual Firmware Change (Flashing)
Use the original HTC USB cable for manual updates to ensure a stable connection with your PC.