Xperia Arc/Xperia Arc S users can now get a taste Android 4.2.1 Jelly Bean via CyanogenMod 10.1. This is a Alpha Preview Based On CM10.1 and there may be bugs or issues. As per the source page Bluetooth and Camera are not working.
However, if you don’t want to wait for the official release of Android 4.2.1 for Xperia Arc/Xperia Arc S then you can go through the guide mentioned below to install CM10.1 based on Android 4.2.1.
The guide mentioned below is only for Xperia Arc/Xperia Arc S and cannot be tried on any other device. You can check model of your device by going to Settings » About phone.
We cannot be held liable of any damage done to your device while following the below mentioned procedure.
Install CyanogenMod 10.1 on Xperia Arc/Xperia Arc S
Take a complete backup of data,apps and settings as the procedure may wipe your data. Select “Backup and Restore” and then select “Backup” again.
Make sure that the battery of device has a minimum charge of 60%.
Enable “USB debugging” on your device by going to Settings >> Developer options >> Enable USB debugging.
Make sure that ClockworkMod Touch Recovery is installed on your device.
Download CyanogenMod 10.1 from here and Google Apps Package from here.
Copy both the zip files to SD-Card of your device without extracting.
Switch off device and enter into recovery. Press and hold the Volume Up and Volume Down and Power buttons to enter recovery.
Perform a Nandrop backup of your existing ROM so that you acn revert later if required. Select “Backup and Restore” and then select “Backup” again.
Select “wipe data/factory reset” and confirm to wipe data. Wait for few minutes till data gets wiped.
Select “install zip from sdcard” and select “choose zip from sdcard”. Navigate to ROM file and select to confirm installation. Wait for installation to get finished.
Select “choose zip from sdcard” again and select to install “Google apps package”.
Select “Go Back” and select “Reboot System Now” to reboot your device.
CyanogenMod 10.1 based on Android 4.2.1 is installed on Xperia Arc/Xperia Arc S.