With Android 4.1 Jelly Bean reaching newer devices officially and reaching older devices through less-than-official means, it seems everyone is going to have a taste of the newest sweet treat. If AT&T Galaxy S2 Skyrocket SGH-I727 users were starting to feel left out, turn that frown upside down because XDA Developers member sk8erwitskil has made sure that your device is getting its own share of the update through a custom ROM.

CyanogenMod 10 is what's in because it's a custom ROM that lets devices experience Jelly Bean. Dedicated Android developers are working hard to make sure to spread the sweetness far and wide, and that includes the AT&T Galaxy S2 Skyrocket.

The ROM port is still in its alpha stage and that means that a number of things aren't working just yet. You can expect bugs like switching to landscape mode while viewing videos in the YouTube app to cause a reboot, the camera not working, and in-call echo. It's an alpha build after all, but data, Bluetooth, Google Apps, ADB, messaging, Wi-Fi, and sound are working properly.

Want to upgrade Galaxy S2 Skyrocket I727 to Android 4.1.1 Jelly Bean? Keep reading for the requirements and the instructions on how to flash the CyanogenMod 10 alpha build to your AT&T Galaxy S2 Skyrocket.

Warning

• The instructions in this guide are intended for use with the AT&T Galaxy S2 Skyrocket, model number SGH-I727. Applying these instructions on another device or model may produce undesired outcomes.
• The information in this guide is provided for instructional and educational purposes only. There is no guarantee that these instructions will work under your specific and unique circumstances.
• Use these instructions at your own risk. We shall not hold any responsibility or liability for whatever happens to you or your device arising from your use of the info in this guide.
• Read and understand the whole guide first before actually performing the instructions.

Requirements

• AT&T Galaxy S2 Skyrocket SGH-I727 with ClockworkMod Recovery installed
  • Check our guide for flashing ClockworkMod Touch Recovery to the Galaxy S2 Skyrocket.
• Backup all personal data on your phone to make sure you have a copy of your personal data (e.g., contacts, SMS, MMS, Internet settings, Wi-Fi passwords, and the like) in case the procedure in this guide erases such data.
  • For backup tips, check our guides on how to sync your data to the cloud and how to create local backups of your mobile data.
• Download the following:
  • CyanogenMod 10 Alpha (cm-10-20120722-UNOFFICIAL-skyrocket.zip, md5sum: fcac24ab236386b4e4bd9728bb5f94c7)
  • GApps package (gapps-jb-20120717.zip, 85.7 MB)
  • SuperUser/Root package (SuperSU-0.93-Busybox-1.20.2.zip, 1.1 MB)
  • DarkSide Super Wipe file (DARKSIDE.SUPER.WIPE_EXT4.zip, 1.1 MB)

Instructions

1. Copy the four ZIP files to the internal SD card on your Galaxy S2 Skyrocket
2. Turn off your Galaxy S2 Skyrocket.
3. Boot into Recovery Mode. You can do this by pressing and holding down the Volume Up, Volume Down, and Power buttons together until the Samsung screen appears.
4. Make a NANDroid Backup of your current ROM. Select Backup and Restore and select Backup.
5. Select Install ZIP from SD Card. Select Choose from SD Card and select the DarkSide Super Wipe file.
6. Select Mounts and Storage and select Format Cache.
7. Select Install ZIP from SD Card. Select Choose ZIP from SD Card and locate the CyanogenMod 10 Alpha ROM.
8. Once the CyanogenMod 10 Alpha ROM has finished installing, select Install ZIP from SD Card again. Select Choose ZIP from SD Card and locate the GApps file.
9. Once GApps has finished installing, select Install ZIP from SD Card again. Select Choose ZIP from SD Card and locate the SuperSU ZIP file.
10. Once SuperSU has finished installing, select Go Back.
11. Select Reboot System Now.

Fantastic! You can now test Android 4.1.1 Jelly Bean on your Samsung Galaxy S2 Skyrocket SGH-I727 via CyanogenMod 10 alpha build.