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For this week’s custom ROM of the week for Sprint Galaxy S4, check out the latest MJA stock rooted Android 4.3 ROM. This is the official Android 4.3 Sprint firmware that Sprint pushed out and for those of you already rooted, you probably do not want to unroot and get this update as it will add Knox counter to your phone.
If you don’t know what Knox counter is, it is basically like binary counter that Samsung has put on starting with new phones like Note 3 and Android 4.3. It may benefit just a few of you who are using your phone for business and need additional security features but for rest of us custom ROMers, this is simply bad news as it can tell Sprint whether you’ve rooted your phone or not.
So, here’s how to install the rooted Android 4.3 firmware so you can enjoy it without upgrading to the latest Knox bootloader.
You can use this method to also install any Android 4.3 TouchWiz-based custom ROMs.
Step 1. Power off your phone, then put it into ODIN Download mode by holding down Volume Down, Center Home, and Power button together for about 5 seconds.
Step 2. Hit Volume Up button to enter ODIN Download Mode then connect a micro-USB cable from your phone to your computer.
What is a Custom ROM?
A custom ROM is a custom, modified operating system that you can install on your Android device. Basically it's like installing Windows OS on a Macbook. By installing a custom ROM, you can bypass stock factory settings like locked hotspot tether, install new Android versions early, or even convert your phone into another OS.
With a custom ROM, you can really maximize the capabilities of your smartphone by adding custom features that have been developed by open source developers.
How to Install Custom ROMs
First, you will need to root your device, if it is not rooted yet, follow our root tutorial and root your phone.
Once rooted, you should have TWRP installed on your phone. Installation of a custom ROM is easy if you learn the basic of it. If you don't know how to install custom ROMs using TWRP recovery, see our tutorial on How to Install Custom ROM using TWRP!