How to easy Update Sony Xperia Arc S to CM 10.1 Android 4.2.1 Jelly Bean

Android 4.1 Jelly Bean is still far-off from reaching Sony Xperia Arc and Arc S but with the help of CyanogenMod 10.1 you will get Android 4.2.1 Jelly Bean goodness right on your phone. If you want to get Google Now and Venture Butter, improve now with CM10.1!
Warning: This is a custom ROM and developers are not liable for any damages which may occur on your device. Read and follow the instructions carefully to avoid any errors. Do this at your own risk.

How to easy Install JellyBelly Android 4.1.2 Jelly Bean Custom ROM on HTC EVO Shift 4G

This is the JellyBelly Omega Build 1.1 ready by group JellyBelly for the HTC EVO Shift 4G. Although this isn't an official firmware but you can nonetheless set up this Custom ROM update to enjoy Android 4.1.2 Jelly Bean features in your HTC EVO Shift 4G with many customization that you simply won’t discover on stock ROM. JellyBelly Omega Build 1.1 custom ROM relies on BigSplit’s CM10 (unofficial) ROM which customize to make extra controls over inventory ROM.

Few Pre-requisites and Disclaimer

1. Backup all the data you find important like contacts and all. Also make sure your phone has minimum of 60% power while starting the installation process.