Update Verizon Samsung Galaxy S3 with CM 10.1.2 Stable ROM (Android 4.2.2 Jelly Bean build)

CyanogenMod

The CyanogenMod team has launched their latest CM 10.1.2 Stable ROM. You can now use this tutorial and learn how to update your Verizon Galaxy S3 smartphone with this new build. Make sure that you know what you’re doing before getting to the ‘how-to’ part of this post.

Installing this update is easy, it brings new security patches and multiple other new tweaks. In order to successfully update your device, you will first have to take a look at the preparation guide below:

  • use this post only with the Samsung Galaxy S3 model number I535. Do not attempt to update your smartphone in case it’s a different version.
  • your SGS3 needs to be using an unlocked bootloader, it has to be rooted and running a custom Recovery image like CWM or TWRP.
  • use the custom Recovery mode to create a full NANDROID backup of the current ROM. This will set a restore point for your device, a backup that can be used in case something goes wrong during the updating process.
  • the tutorial will ask you to ‘wipe data/ factory reset’ your device, which means that you will lose all contents stored on the system partition. All contents stored on your device’s internal SD card will not be wiped.
  • backup SMS, Call Logs info and APN Internet Settings using the following tools for Android: SMS backup & restore | Call Logs backup & restore | APN Settings Backup & Restore. Root access is required for some of these tools.
  • backup the Contacts info by syncing it with your Gmail account.
  • all the applications data can be backed up using a Google Play Store apps that are designed for these types of activities.
  • enable USB debugging option from the Developer Options menu.
  • read the entire post and make sure not to skip any steps listed below.
  • make sure that your device has enough power left in it before starting the updating process.
  • for any problems that you might encounter during the installation, you will need to tell us in comments.

NOTE: if your device is already running a previous CM 10.1 build, then you might not be forced to apply the ‘factory reset’ step. If you don’t apply factory reset, but the device enters into a boot loop or it refuses to boot into normal mode, then you will be forced to enter again in Recovery mode and repeat the entire tutorial once again.

Now that you know all of the above, continue to the next part of this post and learn how to successfully update your smartphone with the latest stable build of CyanogenMod.

How to install CM 10.1.2 Stable ROM based on Android 4.2.2 JB for Verizon Samsung Galaxy S3:

  1. Download the CM 10.1.2 zip from HERE.
    > save the file on your PC.
    > don’t unzip the contents.
  2. Download Gapps for CM 10.1.x and Android 4.2.2 JB from HERE.
    > save the file on your PC and don’t unzip.
  3. Connect your VZW Galaxy S3 to your computer. Move both files on the phone’s internal SD card and disconnect the devices when the files are copied successfully.
  4. Power off your device completely.
  5. Boot it into CWM Recovery Mode.
    > I’ve used the ClockworkMod Recovery for this tutorial, but you can still use the TWRP version also.
  6. When in Recovery Mode, select first ‘backup and restore’. Create a NANDROID backup of your current ROM before continuing to the next step.
  7. Next, select ‘wipe data/ factory reset’. Confirm this process.
  8. Now, select ‘install zip from sdcard’, then ‘choose zip from sdcard’. Find the CM 10.1.2 zip file and confirm its installation.
  9. After the ROM is successfully flashed, return to the previous screen and select again ‘choose zip from sdcard’. Find the Gapps zip and install it too.
  10. When both zips have been successfully flashed on your device, then you can return to the first Recovery screen.
  11. Select ‘reboot system now’.
  12. Wait for the Verizon Galaxy S3 to boot into normal mode. The first boot process shouldn’t take more than 5 minutes to complete.
  13. Enter your Google Account details and that should be all.

These were all the steps that you had to follow in order to successfully update your device with the latest CM 10.1.2 Stable ROM. If you cannot complete the installation, then you can ask for extra help in our comment field. Make sure to leave a detailed comment telling us exactly which action you have applied during the process.

In case you don’t like this new CM build, then you can easily use the NANDROID backup file created in step 6. Flash it the same way you did with the ROM.