The guideline that directs you in the good process of using the Desire S of  HTC Desire S on the supply to the capability to display the new model of CyanogenMod and a custom recovery image.Establish a backup – Before doing anything
It is important that you remember to have your data backed- up. When you have synchronized the handset with an account in Google, hence the calendar, contacts and choose other Google information cannot be gone and return just after the succeeding synchronization. Nevertheless, you need to have everything backed up you like to save which is not yet saved at the card SD:
- MMS/SMS messages
- Log Call
- Bookmarks
- Applications; you must use File Manager Astro or the Titanium Backup , as example
- Any app information that is not at the  card SD
It is always a good notion to have everything backed-up saved on the card SD in some case the card SD can be arranged to determine any major issues or problems.
SMS Restore &Backup, MyBackup Root and Restore & Call Back up can be the apps that are free that can help with the back- up of all your data.
Custom Recovery Image Installation- S –Off Gaining
Note: You will have to understand the Hboot the Desire S HTC serial number and has on it before you will start the installation.  In order to know the device’s Hboot, you must start into the boot loader through having back on power hold the Power button & Volume down and by powering off the phone. The number serial may be normally seen under the device’s battery, in the box through adb_ devices/fastboot_devices.
1) Install & Download  the drivers  HTC sync – Windows only-Download
2) On the Desire S of HTC you must disable fast boot (Settings<Power< Fastboot).
3) Ensure debugging USB is abled on the HTC Desire S (Settings< Applications< Development< USB Debugging).
4) Then download Revolutionary 0.4pre4-Download
5) You must get the form filled out in site Revolutionary to have a key beta.
6) Then join the Desire HTC in the Computer through USB.
7) After you have the beta key, then launch Revolutionary beta and put in the beta key minding that the key consists both lower and upper case letters.
8) Revolutionary will then try to root that is temporary the Desire S HTC, get S-off and installs the image of custom recovery. The handset will reboot in itself and the whole process must only take some minutes. If the process will take more than fifteen mins. then restart the handset and try again. There are some users that had to try to gain S-off many times before being successful.
Cyanogenmod Flashing
Note – And now only the ‘nightly builds ‘of ‘CyanogenMod’ are ready for the Desire S HTC
Recovery -Method
You must download the CyanogenMod’s new version.
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Optional – You must download the Google Apps for the handset
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- Then put the file of ‘CyanogenMod update,zip’on the card SD  root.
Optional- Put the ‘Google Apps.zip’ on the card SD roots also.
- Then start in the Recovery ClockworkMod.
- After the handset starts into the Recovery ClockworkMod, then employ the buttons side volume to get round and also the trackball or the power button to choose.
Optional- Choose backup and store to make a back-up of latest installation in the Desire HTC.
- Choose the option factory reset/Wipe data/.
- Then choose the ‘partition Wipe Cache’option
- Choose ‘Install zip’ from SD card
- Choose –Choose zip form SD Card
- Choose the ‘CyanogenMod update.’zip
Optional- You must place the Google Applications by doing 7-9 steps again and select the Google Applications update.zip.
-  After the installation is finished, choose ++++GoBack++++ to return to the menu main, and choose the option Restart now the system. The Desire S HTC must now start into ‘CyanogenMod.’
ROM Manager -Method
- You must launch RomManager
Optional- Select the initial option on the application, Flash recovery ClockworkMod to upgrade to the new model.
- Choose the option Download ROM from the menu main in theManager ROM.
- Choose the option CyanogenMod, and then select the new model of CyanogenMod at the menu.
Optional- If you choose the new model of CynogenMod, then check the option Google Applications.
- After the ROM is done loading down it requests if you like toWipe Data and Cache and Backup Existing ROM.
- If user alerts for permission root check to ‘Remember’ and then ‘Allow’.
- The Desire S HTC will reboot now into the cache and wipe data, Recovery and then will install CyanogenMod. If it is done in its installation it may restart into CyanogenMod.