CyanogenMod 9 (Quad-Core version only)
Step 1: Download cm_endeavoru-ota-eng.noeri-003.zip through this link and extract.
Step 2: Connect your HTC One X to your computer via USB.
Step 3: Shut down your device, and once you’ve completely turned it off, press and hold Volume Down + Power buttons to boot into recovery.
Step 4: Open up a terminal app and type in the following command:
fastboot flash boot boot.imgboot.img will have been extracted from your .zip file in Step 1. After that, CWM will have been flashed onto your device.
Step 5: From there, simply reboot and enjoy CyanogenMod 9 on your device!
MIUI 4
Note: Requires unlocked bootloader and CWM recovery. If you’re partaking in this guide, you’ll likely have the HTC Sync software already installed, but if you don’t you’ll also need it installed in order to continue.
Step 1: Download the ROM from here, and copy the .zip file onto SD card of your device.
Step 2: Extract boot.img from the .zip file.
Step 3: Presuming you have Fastboot, copy the boot.img file into your Fastboot folder.
Step 4: Switch off your device, then enter fastboot mode. Hold Volume Down button then press the Power key. Then, select fastboot mode and connect your device to your PC.
Step 5: Open Command Prompt, and type in
cd c:\Fastboot(presuming fastboot folder is on your C: drive)
Step 6: Next, type in
fastboot devicesthen
fastboot flash boot boot.imgStep 7: Once the process is complete, disconnect your device, and on your phone, select HBOOT using the Power button. Then, select RECOVERY, which will, as you can probably guess, boot your device into recovery mode.
Step 8: From the Recovery menu, select install zip from sdcard, then select choose zip from sdcard. After that, select the ROM file.
Step 9: Finally, select go back then select reboot system now to reboot the phone and boot into MIUI ROM. Once MIUI boots up, change the language to English, and reboot your device
Once your device has rebooted, go to Settings > Language and Input, then opt for the HTC Sense Input.
