Galaxy S3 Install Cyanogenmod Marshmallow

Samsung Galaxy S III (i9300)

Download cyanogenmod firmware

• http://download.cyanogenmod.org/?device=i9300

Download twrp recovery. Note that cyanogenmod has its own (dated) recovery option.

• http://www.teamw.in/project/twrp2/114/

Download Opengapps ARM 6.0 Nano

• http://opengapps.org/

Installing a custom recovery

Install Heimdal on your system. You can use Heimdal to upload and replace files on your phone while the system is not running.

sudo add-apt-repository ppa:modycz/heimdall
sudo apt-get update
sudo apt-get install heimdall

Boot the Galaxy S III / i9300 (International) into download mode: Hold Home, Volume DOWN & Power until the screen turns on.

In the directory where you downloaded the the recovery image type:

sudo heimdall flash --RECOVERY recovery.img --no-reboot

On your phone a blue transfer bar will appear on the device showing the recovery being transferred.

Manually reboot the phone into recovery mode by performing the following: Hold Home, Volume UP & Power until the screen turns on. The copying of the files to the phone is handled in background.

sudo apt-get install android-tools-adb
sudo adb push cm-13.0.1-20160805-NIGHTLY-i9300.zip /sdcard/
sudo adb push open_gapps-arm-6.0-nano-20160805.zip /sdcard/

On your phone select

1. Install
2. select cm-zip file
3. select open gapps zip file
4. install
5. reboot
6. the phone will prepare

Note

• It can happen the phone can not be turned off, then battery removal is the only option.
• If this is not your first time the install will be done as an upgrade. If you want a clean install you need to reset/wipe some stuff first.