Install CM10.1 RC5 on T-Mobile, Verizon, Sprint and AT&T Galaxy S3 (JB 4.2.2 custom ROM)

If you want to improve the Android Jelly Bean experience that runs on your Galaxy S3 then you should test the new release of CM10.1 JB 4.2.2 custom ROM. I’m talking about the RC5 build which comes with few improvements (minor ones) and bugs fixes in order to upgrade the previous CM10.1 RC4 firmware which was offered only a couple of weeks ago. So, during this tutorial I will show you how to install the Android 4.2.2 based CM10.1 RC5 software on the Samsung Galaxy S3; the ROM and this step by step guide is compatible with the following versions of the SGS3: T-Mobile – T999, Sprint – L710, Verizon – I535 and AT&T – I747.

CM10.1 is one of the most popular Android 4.2.2 powered custom update available on the market, as the firmware is stable, comes with great features, apps and capabilities and most important it is suitable with almost all the Android based devices out there. Furthermore, the CM team had improved the platform several times and now we have the RC5 build of the system. The new release is more stable and brings several new features and apps which, by the way, will smoothly work on your Samsung Galaxy S3.

As already mentioned, the present guide can be used for the galaxy S3 model numbers T999, L710, I535 and I747 as the CM10.1 RC5 ROM is being suitable with the T-Mobile, Verizon, Sprint and AT&T branded SGS3. You will have suitable download links for all the mentioned models of the smartphone so you have nothing to worry about. Also, during the next lines I have explained how to prepare your S3 for the update procedure that will follow, and finally I have resumed the proper flashing operation.

This guide is showing how to apply a custom update and not an official one. That’s why the CM10.1 RC5 firmware can only be manually flashed on your Galaxy S3. This is not an official software so this operation has nothing to do with Samsung or Google – we should thanks the CM team for this opportunity.

Anyway, if you have decided to complete this guide for updating your T-Mobile, Verizon, Sprint and AT&T Galaxy S3 with the CM10.1 RC5 Jelly Bean 4.2.2 custom ROM, then start the installation procedure with the pre requisites (the preparation tasks). As usual, when dealing with such operations (custom and unofficial ones) you should first root the system of your phone. You see, a custom updated will work only on an unchained system because, the custom firmware will have to access in built programs, not to mention that important changes will be applied on the internal system of your phone – else you won’t be able to improve, customize and optimize the same.

Therefore, gain root access before doing anything else. Be aware as the root operation has its consequences; the most relevant one is related to the warranty. Unfortunately, the S3 warranty will get void and the only way in which you can restore the same is by downgrading / updating your handset to the stock / official Android OS.

Then, install a custom recovery image – CWM recovery – on your Galaxy S3. Without completing this step you will not be able to apply the CM10.1 RC5 software, so don’t skip it. The custom recovery tool must be installed because the stock recovery isn’t useful when dealing with unofficial ports of the Android OS.

Now, we have everything prepared. But in order to avoid the unpleasant situations you still have to do some stuffs and the first to begin with is the backup operation. A wipe will be required which means that without completing a full backup, you will probably lose your contacts list, personal info and accounts, text messages, call logs, market apps, EFS settings and basically everything else that’s saved on the internal storage memory. Also, I recommend you to use the custom recovery image for applying a Nandroid backup – do this if you want to save the current ROM (you can restore it if the CM10.1 RC5 platform isn’t on your taste).

Finally, a computer, your device and its USB cable are being required. Also, I recommend you to do the following: uninstall the security programs from both computer and handset, enable the USB debugging option on your phone, charge the battery of your S3 especially if you notice that there is less than 60% power left in its system. Remember that this guide is compatible with the T-Mobile, Verizon, Sprint and AT&T Galaxy S3 (model numbers T999, L710, I535 and I747) so try not to mess things up.

How to Install CM10.1 RC5 on T-Mobile, Verizon, Sprint and AT&T Galaxy S3 (JB 4.2.2 custom ROM)

  1. Download the CM10.1 RC5 ROM file by using the following links: for the T-Mobile version of the S3 use the link from here, for the Verizon model go here, for Sprint use this link and for AT&T Galaxy S3 use the page from here.
  2. Also, download the Google Apps package by using the link from here.
  3. Save the files on your computer; don’t unzip them.
  4. Connect your smartphone with your computer.
  5. And copy-paste the downloaded files from the PC to your phone’s SD card.
  6. Disconnect the devices.
  7. Turn off your device as you need to enter the recovery mode.
  8. For recovery press and hold Volume Up, Power and Home buttons at the same time.
  9. Then, use the recovery and perform the wipe: “wipe data factory reset” and “wipe cache partition”.
  10. Return to recovery; select “install zip from sd card” followed by “choose zip from sd card”.
  11. Select the firmware file and install the ROM on your S3.
  12. Return and repeat the previous step.
  13. Select the Google Apps package and flash the same on your phone.
  14. In the end, select “+++go back+++” and “reboot system now”.
  15. Done.

Congratulations, you now know how to update your Samsung Galaxy S3 to CM10.1 RC5 Custom ROM firmware. Your handset is running on a custom Jelly Bean 4.2.2 OS, so test the new features, apps and capabilities. If there were problems while trying to apply the steps from above, use the comments area from below and share the issues with us; we will try to assist you in the shortest time possible.

Samsung Galaxy S3 Articles