A new official firmware I9300ZSEMC1 is available to be downloaded for Galaxy S3 I9300 users in Hong Kong. We will be going through the guide to install the firmware manually on your device, the firmware can also be installed via Kies Software. ZSEMC1 Android 4.1.2 Jelly Bean is an official firmware update by Samsung for Galaxy S3 I9300 and not a Custom ROM, you will lose root. We will be going through the guide to root Galaxy S3 I9300 later.
To flash the firmware on Galaxy S3 I9300 Odin is used.
Date: 2013 March
The guide mentioned below is only for Galaxy S3 I9300 and is not compatible with any other device. To know the model number of your device go to Settings >> About Phone.
We cannot be held liable of any damage done to your device while following the below mentioned procedure.
Install official ZSEMC1 Android 4.1.2 firmware on Galaxy S3 I9300
Take a complete backup of data,apps and settings as the procedure may wipe your data.
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.
Download Kies Software to install drivers.
Extract the Firmware file which you have downloaded in above step. You will get “.tar” file along with other files.
Extract Odin to get “Odin3 v3.07.exe” file.
Switch off device.
Boot device into download mode. Press and hold Volume Down, Home, Power till device turns on and then press Volume Up to enter download mode.
Connect device to computer using USB cable. Odin will detect your device and ID:COM will turn yellow and a message appears saying “Added”. Re-install drivers if Odin fails to detect device.
Click on “PDA button” in Odin and navigate to select “.tar″ file which you have downloaded.
In Odin make sure that “Auto Reboot” and “F.Reset Time” are selected and “Re-Partition” check box is unchecked.
Click on Start button in Odin to start flashing Android 4.1.2 firmware. When flashing is complete you will get a PASS message.
Disconnect device from your computer and let it boot automatically.
ZSEMC1 Android 4.1.2 firmware on Galaxy S3 I9300 is now installed. You can check firmware version by going to Settings >> About Phone.