Just when you thought the HTC Evo 4G has been left behind in development, XDA Developers member jmztaylor has compiled CyanogenMod 10, based on Android 4.1.1 Jelly Bean, for the said phone.

Jelly Bean comes with triple buffering interface, a smarter keyboard,  faster response in switching between previous apps, new navigation menu, and much more. In addition to all the new features that Jelly Bean has to offer, CyanogenMod 10 has its own add-ons for better performance and great customization on your HTC Evo 4G.

CyanogenMod 10 for the Evo 4G is still in a very early stage of development and is not yet suited for daily use.  In fact, the ROM is still best considered a preview build.  According to the dev's notes, Wi-Fi, sound, phone calling, data, and SMS work, but the camera, camcorder, 4G data, and front-facing camera don't work yet.

In this guide, learn how to upgrade the Evo 4G to Android 4.1.1 Jelly Bean via CyanogenMod 10.

Warning

• The instructions in this guide are intended for use with the HTC Evo 4G (HTC Supersonic). Applying these instructions on another device or model may produce undesired outcomes.
• The information in this guide is provided for instructional and educational purposes only. There is no guarantee that these instructions will work under your specific and unique circumstances.
• Use these instructions at your own risk. We shall not hold any responsibility or liability for whatever happens to you or your device arising from your use of the info in this guide.
• Read and understand the whole guide first before actually performing the instructions.

Requirements

• HTC Evo 4G with unlocked bootloader, S-OFF, and ClockworkMod Recovery installed
  • Check out this toolkit that will easily unlock, root, and S-OFF your phone.
• Download the following:
  • latest CyanogenMod 10 ROM build for the Evo 4G (cm-10-20120805-UNOFFICIAL-supersonic.zip, md5sum: 70e6dd57d996b5bb1d48337b11cd41d5)
  • GApps (Google Apps) package (gapps-jb-20120726-signed.zip, md5sum: f62cfe4a827202899919fd932d5246d7)
• Backup all personal data on your phone to make sure you have a copy of your personal data (e.g., contacts, SMS, MMS, Internet settings, Wi-Fi passwords, and the like) in case the procedure in this guide erases such data.
  • For backup tips, check our guides on how to sync your data to the cloud and how to create local backups of your mobile data.

Instructions

1. Copy the CyanogenMod 10 ROM and GApps ZIP files to the phone's SD card.
2. Turn off your phone and boot into HBOOT. To boot into HBOOT, hold down Volume Down and the Power buttons at the same time until HBOOT boots.
3. Use the Volume Down button to highlight Recovery, then press the Power button to select it.
   • NOTE: In Recovery, use the Volume Up and Down buttons to navigate and Power button to select.
4. Create a NANDroid backup of your current ROM. From the main recovery menu, select Backup and Restore and select Backup on the next screen.
5. Perform a full wipe by doing the following:
   • Select Wipe data/factory reset and confirm the action on the next screen.
   • Select Wipe cache partition and confirm the action on the next screen.
   • Select Mounts and Storage, then choose Format /system and confirm the action on the next screen.
   • Go back to the main recovery menu.
6. Select Install ZIP from SD card, then select Choose ZIP from SD card.
7. Highlight the CM10 ROM ZIP file and select it using the Power button. Confirm the action on the next screen to flash the ROM to your mobile phone.
8. Go back to the main menu and flash the GApps package in the same manner as in step 7.
9. Once Google Apps Package is fully installed, go back to main recovery menu and select Reboot system now to reboot your phone and boot into CM10.

Contractions! You have successfully installed CyanogenMod 10 built with Android 4.1.1 Jelly Bean on your HTC Evo 4G.