Upgrade Samsung Galaxy S2 T-Mobile to Android 4.1.2 Jelly Bean via CyanogenMod

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Android 4.1.2 is now available for the Galaxy S2 T-Mobile as CyanogenMod 10 (CM10) final has been released. This CM10 customROM is based on the officialAndroid 4.1.2 Jelly Bean from the AOSP and along with the stockAndroid experience, a number of amazing new features and system tweaks have been added into the ROM. You just need ClockworkMod recovery installed and you will be able to update Galaxy S2 T-Mobile  to Android 4.1.2 CM10 Jelly Bean custom firmwarewith our tutorial.

In this tutorial, we will tell you how to install Android 4.1.2 CM10 Jelly Bean on Galaxy S2 T-Mobile  with complete steps using CWM recovery. Make sure you backup all the data as we will have to wipe your previous personal data and apps as usual when installing custom ROMs. We don’t want anyone losing their data. Let’s begin with the tutorial below.

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 

Make sure you have installed all your USB drivers for the Samsung Galaxy S to connect it with the computer. 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 Androidphone with the PC.

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.

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.

Data can also be backed up using Samsung KIES for their devices, but if you backup data manually, you get more options what top choose from and it is very easy to move data across Android devices from different manufacturers, i.e moving Samsung Galaxy Note backup data to HTC One X.

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

5. Remember, this is not an official firmware update. This is a custom ROM, based on AOSP release of the Android 4.1 Jelly Bean.

Now, let’s proceed with the tutorial on the next page and update Galaxy S2 T-Mobile to Android 4.1.2 CM10 Jelly Bean custom firmware.

However, for beginners, you need to root your Samsung Galaxy S and install a custom recovery. Please Google that up if you are unsure and read the entire tutorial once before actually performing it.

To Remember:

• This tutorial is only for installing Android 4.1.2 CM10 Jelly Bean custom ROM on Samsung Galaxy S I9000. Please do not try on any other Galaxy S variants.
• Your phone should have ClockworkMod recovery installed from before.
• This tutorial will wipe out all your data. Proceed at your own risk.
• Perform a Dalvik Cache wipe before proceeding from the recovery mode.
• Samsung KIES will NOT detect your phone after installing Android 4.1.2 CM10 Jelly Bean because it is a custom ROM.
• Make sure you backup all your data in your phone before proceeding.

Complete Step-By-Step Instructions:

Step 1 - Download Android 4.1.2 CM10 Jelly Bean and Google Apps for Galaxy S to your computer.

Step 2 - Connect and mount your Galaxy S USB memory on your computer using the USB cable.

Step 3 - Now copy/paste the downloaded Android 4.1.2 ROM zip and Google Apps zip files to your SD card. Make sure the files are in the SD card root (not in any folder).

Step 4 - Then turn OFF your phone and disconnect from the USB cable.

Step 5 - Now to get in the Recovery Mode. Switch ON the phone while pressing and holding Volume Up + Home + Power buttons together.

Step 6 - In ClockworkMod recovery, perform a full data wipe first. Then scroll down to “flash zip from SD card” and press the Power button to select it.

Step 7 - Press the Power button again and select “choose zip from sdcard”.

Step 8 -Now using your volume keys, navigate to the Android 4.1.2 ROM zip file that you copied to your SD card and select it using the Power button. Confirm theinstallation on the next screen and the installation procedure should start now.

NOTE: Repeat this same step for the Google Apps zip file as well.

Step 9 - After the installation completes, go to “+++++Go Back” and reboot the phone by selecting “reboot system now” from the recovery menu. The phone will boot now and it might take about 5 minutes to boot on your first time. So, please wait.

That’s it! Your Galaxy S has now been updated to Android 4.1.2 CM10 Jelly Bean! Go to Settings > About phone to verify.

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If you run into any problems, feel free to drop us a comment below and we will reply you back ASAP with the fix or the solution to your problem.