Tips & Tutorials

Update Nexus S I9020 to CM10 Android 4.1.1 Nightly Jelly Bean Custom Firmware

For all those who have been waiting for. Android 4.1.1 Jelly bean custom firmware, based on CyanogenMod 10 (CM10) is now available for download. These are just nightly releases and might have many bugs but the road to the final CM10 has started and you can now install CM10 Android 4.1.1 Nightly Jelly Bean on Nexus S I9020.

In this tutorial, we will tell you how to install CM10 Android 4.1.1 Nightly Jelly Bean custom ROM on Nexus S I9020 with complete steps and instructions on how to backup your phone. Your Nexus S should be rooted and ClockworkMod recovery should be installed. Let’s get on with the tutorial now and flash a new custom ROM on the phone.

Disclaimer: All the tools, mods or ROMs mentioned below belong to their respective owners/developers. We ( or the developers are not to be held responsible if you damage or brick your device. We don’t have you on gun point to try out this tutorial 😉

CyanogenMod 10 (based on Android 4.1.1) Jelly Bean is still in nightly stage and will take several months before it gets matured enough to be released in a beta version. By installing this, you should remember that you may encounter bugs in the ROM after installation.

Make sure you have installed all your USB drivers for the Samsung Nexus S to connect it with the computer. Download Samsung Nexus S USB drivers! Apart from just the USB drivers, there are a few more things that you need to take care of.

1. You need to enable USB debugging mode. This helps to connect your Android phone with the PC. See here: How to Enable USB Debugging.

2. Your phone battery should be 80-85% charged. If your phone goes off suddenly because of battery, during flashing ROMs or installing mods and updates — your phone might go dead permanently. See here: How to Check Battery Percentage.

3. Backup all your important data that you might need as soon as your flash a new ROM, or make a backup for just in case, you never know when anything might go wrong. See below on how to backup data:

4. Your phone should be factory unlocked. Additional instructions for locked Android devices will be added in the tutorial for unlocking devices.

Now, let’s proceed with the tutorial on the next page and update Nexus S I9020 to CM10 Android 4.1.1 Nightly Jelly Bean custom ROM.