Samsung has rolled out I727UCMC1 Android 4.1.2 Jelly Bean official firmware for Samsung Galaxy S2 Skyrocket AT&T I727. You can go through the guide to install the latest firmware UCMC1 manually on your device, the firmware is also available OTA and can also be installed via Kies Software. UCMC1 Android 4.1.2 Jelly Bean is an official firmware update by Samsung for Galaxy S2 Skyrocket AT&T I727 and not a Custom ROM, you will lose root.
To flash the firmware on Galaxy S2 Skyrocket AT&T I727 Odin is used.
Date: March 2013
The guide mentioned below is only for Galaxy S2 Skyrocket AT&T I727 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 UCMC1 Android 4.1.2 firmware on Galaxy S2 Skyrocket AT&T I727
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.
UCMC1 Android 4.1.2 firmware on Galaxy S2 Skyrocket AT&T I727 is now installed. You can check firmware version by going to Settings >> About Phone.