Official Android 4.1.2 Jellybean UCMC1 Update for AT&T Samsung Galaxy S2 I727 Skyrocket


Another Android 4.1.2 jellybean update is now rolled out for Skyrocket, the [easyazon-link asin=”B006V47ONU”]AT&T Samsung galaxy S2 I727[/easyazon-link]. This jellybean update dubbed as UCMC1 build code, having all latest jellybean features and improvements. More are listed below.

Enhancements in UCMC1

  • Latest Android 4.2.1 jellybean base
  • Latest Nature UX
  • New locksreen customization settings
  • New widgets
  • Smart Stay
  • Direct Call
  • Better camera functions
  • S Cloud service by Samsung
  • ‘Buttery smooth’ interface
  • Google Now
  • Expandable notifications
  • Better keyboard and tons of other new features

Users can update their galaxy S2 by KIES or by the OTA notification, but some user won’t get the update cause of out of reach or preinstalled custom firmware base which prohibits the OTA update notification. So a manual update method is required here, which covered the remaining guide. Use it carefully with some precautions and warnings first!

Precautions and Warnings

      • After applying this official update you will lose your preinstalled custom ROMs, custom recoveries and root access
      • This update is only for [easyazon-link asin=”B0075WLO60″]AT&T Samsung galaxy S2 I727 skyrocket[/easyazon-link], so don’t ever try to use this tutorial on any other device
      • For more about flashing and firmware, read- FAQs about firmware flashing on Samsung androids

Disclaimer: Following this guide is at your own risk, if unfortunately  your device gets damaged or bricked during the process, is not responsible. So please read all warnings and notes and follow steps carefully

Tutorial to Update AT&T Samsung Galaxy S2 I727 Skyrocket with Official Android 4.1.2  jellybean UCMC1 Firmware

First! Gather some required files and apps

Second! Prepare your phone

Third! Follow these Instruction to Install the firmware

1. Extract the UCMC1 firmware package and get the firmware file.

2. Extract Odin package and launch Odin 3 v3.07.


3. Now switch off your galaxy S2.

4. After that reboot your S2 in download mode by- press and hold “Volume down”+ “Volume up” and then the power button simultaneously until a warning screen will displayed. Then just press the “Volume up” button to confirm.

5. Connect your S2 with your PC via USB cable.

6. Check Odin, ID:COM section turns yellow or blue shaded and Addedmessage appears, means the phone is connected.


Image credit to <Androidlegend>

7. Now click on “PDA” tab and select the firmware file having “.tar.md5” extension in its name, which you got in step 1 before.

8. Check the options Auto Reboot and F.Reset Time are ticked in Odin.

9. After it just click on “Start” button to flash the firmware.

10. It will take 5-6 minutes approx for flashing. A message as “PASS” will appear in Odin and your device will reboot automatically after the completion of installing.

Now just unplug your USB cable.

That’s all. You have successfully updated your [easyazon-link asin=”B006V47ONU”]AT&T Samsung galaxy S2 I727 skyrocket[/easyazon-link] to official Android 4.1.2 jellybean UCMC1 firmware.

Thanks to <>

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