How to Install Android 4.3 Jelly Bean on T-Mobile Galaxy S3 SGH-T999 [Ultimate Guide]

 

Now we can install Android 4.3 CM10.2 ROM on T-Mobile Galaxy S3 SGH-T999smartphone. Samsung has not yet releaseAndroid 4.3 update for the said device, but don’t worry because CM10.2 ROM developed by CyanogenMod is coming to our rescue.However it’s a nightly build ROM, thus expect some bugs and there are features that don’t work.

Samsung-Galaxy-S3-SGH-T999

If you want to install CM10.2 ROM Jelly Bean 4.3 on T-Mobile Galaxy S3 then you can follow the instructions below

Disclaimer: The procedure given in this tutorial is considered as risky and may cause damage to your phone. It is recommended that you should not follow it unless you are familiar with these things. Follow this guide completely at your own risk.

I. Before You Begin:

1. The following procedure works for AT&T Galaxy S3 SGH-I747 only.

2. Make sure your device have at least 80% battery power.

3. Make sure USB Debugging is enabled

4. Make sure your device must ClockworkMod Recovery (CWM) installed

II. Downloading Required Files:

1. Android 4.3 CM10.2 ROM

2. Google Apps

III. Install Android 4.3 CM10.2 Jelly Bean on Galaxy S3 SGH-I747

1. Download Android 4.3 CyanogenMod 10.2 ROM for Galaxy S3 SGH-I747 and alsodownload Google Apps on computer.

2. Connect the Galaxy S3to computer via USB cable.

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3. Copy the downloaded firmware zip to the root folder on tablet’s SD card.

4. Disconnect the tablet from computer and then Power it off

5. Boot the Galaxy S3 into recovery mode by pressing and holding Volume Down, Power buttons together.

Note: In recovery mode, use Volume buttons to navigate between options andPower button to select the desired option.

6. In recovery mode first a Nandroid backup of the existing ROM.

A Nandroid backup, select Backup and Restore then select Backup again on the next screen. When backup is completed return to the main recovery menu.

7. Select wipe data/factory reset then select Yes on the next screen to confirm the action.

8. Then select wipe cache partition and after the wiping process completes select Wipe Dalvik Cache under advance option. Once the wiping process is done, return to the recovery menu.

9. Select Install Zip from SD card then select Choose Zip from SD card. Now locate the Android 4.3 CyanogenMod 10.2 ROM zip which was earlier copied to the tablet’s SD card. Hit the Power button to select it and confirm installation on next screen.

10.   Once the installation process is complete, return to the main recovery menu and hit Reboot System Now.

The Galaxy S3 should now be successfully updated with Android 4.3 CyanogenMod 10.2 ROM. Navigate to Menu>> Settings>> About Tablet >> Software info to verify the new firmware installed.

NOTE: To go back to the previous ROM in Step 6, boot the tablet into recovery mode. Then select Backup and Restore and restore the ROM by selecting it from the list.

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