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Install Android 4.1.2 Jelly Bean update for AT&T Galaxy S2 Skyrocket


Just after T-Mobile variant, the AT&T Galaxy S2 variant is getting the Jelly Bean update, the Android 4.1.2 Jelly Bean update for AT&T Skyrocket is available over Samsung KIES at this time that contains I727UCMC1 firmware. This update will make your phone’s performance very fast and smooth while giving you a Google search experience through Google now app.

Pick up your AT&T Galaxy S2, connect the phone to Samsung KIES, it should pop up Jelly Bean update for installation, however if you’re not able to update phone with KIES due to any reason, simply install it manually using Odin as we’re doing here.

This guide shows you how to download and install the Android 4.1.2 Jelly Bean update for AT&T Galaxy S2 Skyrocket SGH-I727. Use a Windows PC with USB driver installed, KIES can be used to install drivers but disable it before installation because it may disturb installation. You need to backup everything because the below procedure may wipe data, you can sync your contacts with Gmail account and for messages use SMS apps, lastly use the carbon Android app to backup apps and data.

DISCLAIMER: Please proceed the below guide at your own risk, Android Egis will not be held responsible if your device lost data or gets damaged following this guide.

Instructions

Step #1: Download Skyrocket Android 4.1.2 Jelly Bean update UCMC1 firmware from here (File Name: I727UCMC1_I727ATTMC1_XXX.zip).

Step #2: Unzip the downloaded zip file into a folder.

Step #3: Download Odin3 v1.83.exe to your phone, it will be used to install the firmware.

Step #4: Run the download Odin3 v1.83.exe file.

Step #5: Turn the device off.

Step #6: Reboot the device into download mode, to do so, plug the USB cable to phone but not to PC, then reboot phone by holding down volume down and volume up buttons while plugging the USB cable to PC, on you see download screen with Android logo on phone, leave both buttons.

Step #7: Odin will detect the device, ID:COM will turn yellow and a message saying ADDED will appear. (Note: If Odin doesn’t detect the device, make sure that USB drivers are properly installed on your computer). Click on PDA Button and locate I727UCMC1_I727ATTMC1_XXX_HOME.tar.md5 that you’ve obtained in the step 2. (Note: Don’t make any change, just make sure that re-partition is unchecked).

Step #8: Click on Start button to start installation, once the installation done, your device will reboot itself and you’ll see message saying PASS (Note: If Odin refuse to install the update and show message FAIL, or get stuck, close the Odin and unplug device, then pull out battery from the device for a few seconds. Then put the battery back to the device and reboot into download mode. Then install the firmware again.

Step #9: If your phone boots up properly in normal mode, you’re done, unplug the phone from PC but if it gets stuck at booting or boots in 3e recovery (screen with black background), you have to perform wipe, to do so, turn off phone and reboot into recovery mode by holding down volume down, volume up and power buttons until screen turns on. Once you’re in recovery mode, select the wipe data/factory reset, and confirm on the next screen. After wiping the device, return to the main menu and reboot phone, to do so, select “Go Back” after that select “Reboot System Now.”

That’s it, the Android 4.1.2 Jelly Bean I727UCMC1 firmware is now installed on your AT&T Samsung Galaxy S2 Skyrocket, if you experience any error, leave a comment.

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