CyanogenMod, a free, community built, aftermarket firmware distribution of Android 4.2 Jelly Bean, offers features that are not found in the official firmware distributed by vendors of the supported devices. A few notable Android 4.2.1 Jelly Bean features include multi-user support, gesture typing, new quick settings option, lock-screen widget, new camera app, photo sphere, improved Google Now, new daydream feature and miracast display among others.
Here is a tutorial that shows how to install CM10.1 Android 4.2.1 Jelly Bean on various U.S. variants of Samsung Galaxy S3, including carriers like Sprint, Verizon, T-Mobile, AT&T, US Cellular and Cricket.
The users must take note that CM10.1 ROM is in the nightly stage now, and therefore, there could be flaws. However, all issues are expected to be resolved as development progresses.
Before going ahead with the tutorial, take a look at the prerequisites that need to be aware of.
- Backup your data.
- The device must have at least 80 percent battery power.
- USB driver must be installed for Samsung Galaxy S3 in your PC.
- USB Debugging must be enabled.
- Backup your EFS Folder.
- Flashing this ROM on your Galaxy S3 will increase your binary counter.
- Never skip Nandroid backup as it’s very helpful if this custom ROM doesn’t work the way you wanted.
In addition, IBTimes cannot be held responsible if anything goes wrong. The users should proceed at their own risk.
Step 1: Download the appropriate CM10.1 Android 4.2.1 Jelly Bean ROM for your Galaxy S3.
Sprint Samsung Galaxy S3 - CM10.1 4.2.1 Jelly Bean ROM For Samsung Galaxy S3 L710 [Filename: cm-10.1-20121231-NIGHTLY-d2spr.zip]
Verizon Samsung Galaxy S3 - CM10.1 4.2.1 Jelly Bean ROM For Samsung Galaxy S3 I535 [Filename: cm-10.1-20121231-NIGHTLY-d2vzw.zip]
T-Mobile Samsung Galaxy S3 - CM10.1 4.2.1 Jelly Bean ROM For Samsung Galaxy S3 T999 [Filename: cm-10.1-20121231-NIGHTLY-d2tmo.zip]
AT&T Samsung Galaxy S3 - CM 10.1 4.2.1 Jelly Bean ROM For Samsung Galaxy S3 I747 [Filename: cm-10.1-20121213-UNOFFICIAL-d2att.zip]
US Cellular Samsung Galaxy S3 - CM10.1 4.2.1 Jelly Bean ROM For Samsung Galaxy S3 R530 [Filename: cm-10.1-20121231-NIGHTLY-d2usc.zip]
Cricket Samsung Galaxy S3 - CM10.1 4.2.1 Jelly Bean ROM For Samsung Galaxy S3 R530C [Filename: cm-10.1-20121231-NIGHTLY-d2cri.zip]
Step 2: Download Google Apps [Filename: gapps-jb-20121212-signed.zip].
Step 3: Connect your Samsung Galaxy S3 to your PC using USB cable.
Step 4: Copy downloaded files to the SD card of your phone. But don’t extract them.
Step 5: Disconnect USB and switch off your phone.
Step 6: Boot into recovery in your Galaxy S3 by pressing and holding the Volume Up, Power and Home buttons together until the Samsung logo appears on screen.
Step 7: Release the buttons and hold them again. You will get ClockworkMod recovery screen soon. Browse between options in recovery using Volume keys while using Power key to select an option.
Step 8: Perform a Nandroid backup of your existing ROM by selecting Backup and Restore, then on the next screen, selecting Backup again. Once back up is complete, go back to the main recovery menu.
Step 9: Carry out the data wiping task by selecting wipe data/factory reset. Now select Yes on the next screen to confirm the action. Wait for a moment till the data wipe is completed.
Step 10: Select install zip from sdcard, then select choose zip from sdcard. After that locate the suitable CM10.1 Android 4.2.1 Jelly Bean ROM, which you downloaded in Step 1, and select it by pressing Power button.
Confirm installation by selecting Yes – Install _____.zip on the next screen. The ROM installation will begin.
Step 11: After the ROM installation is complete, repeat step 10 but choose the gapps-jb-20121212-signed.zip file instead of ROM zip to install the Google apps package.
Step 12: When the installation process gets finished, go back to the main recovery menu and select reboot system now to reboot the phone and boot up into customized Android 4.2.1 Jelly Bean ROM CM10.1.
[Source: Android Jinn]