Google, the search giant already launched the Android 6.0 Marshmallow for the Nexus Devices, The other manufacturers like HTC, Samsung, OnePlus are yet to launch the Android Marshmallow based firmware for their devices. CM12 used to be known as the CyanogenMod’s Android Lollipop version. The CM13 stands for the CyanogenMod’s Android Marshmallow.

CM13 Android Marshmallow Galaxy S3

While the other smartphone giants are busy making the official firmware’s for their devices, the Cyanogen Inc, a group of Android enthusiasts making a customized version of Android OS in the form of CyanogenMod is up with CM13. As the title says, we will be up with steps to install Android 6.0 Marshmallow on Galaxy S3. So lets begin with the steps:

How to Install CM13 Android 6.0 Marshmallow on Galaxy S3?

Before beginning with the guide, I’d like to inform you that we are not installing the official firmware for the Galaxy S3. It is a custom ROM which is developed by un-official sources. Though it is named as CM13, it is not officially build by Cyanogen Inc. Installing this ROM also required access to Root and rooting voids the warranty of the phone.

We won’t be responsible for any damages that takes place while or after installing the ROM and rooting the phone.

Since this ROM is an unofficial it has a lot of things which might not work and could bring pain while using the phone. The developer has listed some features which are working and not working, Below I’m listing the things which are working and not working, so if you are someone who uses a lot of things which are found in the not-working list, then you avoid installing this ROM.

– Boots (without sdcard)
– Touchscreen
– WiFi
– Rotation
– Camera
– Sound
– Screenshots
– Bluetooth[/one_half] [one_half_last]Not working:
– Screen colors
– SD Card (Bootloop)

Not tested:




Steps to Install CM13 Android Marshmallow ROM on Galaxy S3 (GT-I9300).

Step 1: Root your Galaxy S3.

To Install the ROM you will require access to Root. In case your device is rooted you can proceed with the step 2, or else follow this guide: “Root your Galaxy S3 (GT-I9300) without PC”. Once done with rooting, you can come back and proceed with Step 2.

Step 2: Install TWRP/CWM Recovery on Galaxy S3.

Well, Installing a ROM is even possible without having a recovery, but having a recovery saves a lot of time and can be done without much computer skills. We recommend TWRP recovery for your Galaxy S3. In case you don’t have TWRP recovery installed follow this guide: “Install TWRP Recovery on Galaxy S3”, if you already have TWRP recovery installed, you can proceed with the next step.


Step 3: Download the CM13 ROM for Galaxy S3 and Google Apps for Android 6.0 Marshmallow.

To Install the CM13 ROM on your Galaxy S3 you will have to Download the CM13 ROM and Google Apps for Android 6.0 Marshmallow. Once downloaded store these files on your SD card or Internal Storage (SD card recommended). It is also recommended to store the files to the outermost of the SD card/internal storage.

Step 4: Boot into Recovery Mode & Flash the ROM and Google Apps.

Once you’ve downloaded and stored the ROM & Google Apps on your Mobile device. Reboot your device into recovery mode by pressing “Power button + Volume UP + Home Button” simultaneously. In case you don’t want to press the keys, follow the guide: “Reboot into Recovery Mode without pressing buttons”.

Once you are into the recovery, click on “Install Zip” and select the CM13 ROM which you’ve downloaded, after installing that, install the Google apps package. Once done with installing both the zip files, Restart or reboot your Galaxy S3 and you will see Android Marshmallow running on your Galaxy S3.


Have some queries? Faced any problems while installing the Cyanogenmod 13 ROM on your Galaxy S3? Post us your queries and we will try to solve your problem!

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