>How To Gain S-OFF (Radio And Engineering) On HTC Desire HD


We have previously featured a guide on how to root HTC Desire HD and now, we are continuing this series with this comprehensive guide on gaining the S-OFF flag on your phone to gain complete control over it. This is basically done by installing a custom bootloader to the phone that has the S flag set to off, allowing you to install a custom recovery image and thus, flash a custom ROM to your phone.
After you are done with following this guide, you should have an HTC Desire HD ready for installation of ClockworkMod recovery that lets you flash hundreds of custom ROMs to your device while having full read-write access to all its partitions.
Disclaimer: Please follow this guide at your own risk. Tiptz will not be liable if your device gets damaged or bricked during the process.
Gaining Radio S-OFF:
This method will get you the Radio S-OFF flag while SIM-unlocking it and setting up SuperCID, which means
  1. You must have at least temporary root access on your device before you can proceed. See our guide on how to root HTC Desire HD for details on how to get it.
  2. Make sure you have ADB installed on your computer.
  3. Download gfree 0.04 and unzip its contents to your computer.
  4. Enable USB Debugging on your phone from Settings > Applications > Development.
  5. Connect your phone to your computer via USB.
  6. Launch a Command Prompt/Terminal window on your computer, navigate to the folder where you extracted the files in Step 3 and enter the following commands:
    adb push gfree /data/local
    adb shell chmod 777 /data/local/gfree
  7. Install Terminal Emulator app on your phone from the Android Market and launch it.
  8. Enter the following commands in Terminal Emulator on your phone:
    /data/local/gfree -f
    If you get a ‘mkdir: /system/xbin already exists’ error during the process, ignore it and proceed.
  9. Wait patiently while the process finishes. Once it is complete, reboot your phone.
You should now have Radio S-OFF, SIM-unlock and SuperCID all set on your phone. If you just want to install ClockworkMod recovery and custom ROMs etc., you are all good to go and do not need to gain Engineering S-OFF. You may simply install ClockworkMod Recovery, find a custom ROM of your choice and flash it to your phone from recovery.
Gaining Engineering S-OFF:
You should attempt to gain Engineering S-OFF if and only if you want to gain absolute access to your Desire HD including the ability to flash a radio or edit all your phone’s partitions the way you want. If you are not absolutely sure what you are about to do, we recommend that you do NOT proceed.
  1. Make sure you have already gained radio S-OFF by following the above-mentioned steps.
  2. Download the Engineering HBoot for HTC Desire HD and extract the contents of the zip files.
  3. Enable USB debugging (if not already enabled) and connect your phone to the computer.
  4. On your computer, launch Command Prompt/Terminal, navigate to the folder where you extracted the files in Step 2 and enter these commands:
    adb push hboot-eng.img /data/local
    dd if=/data/local/hboot-eng.img of=/dev/block/mmcblk0p18
    Wait till the process is finished and you’re done!
You now have the Engineering S-OFF HBoot installed and with this, you have absolute control over your HTC Desire HD. You can now flash radios of your choice to your phone and have access to modify all its partitions as well as unbrick it in certain circumstances where no other method would revive your device.

About nonerox

Btech Student
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