Looking to update Galaxy S4 I337 to Android 6 Marshmallow? OctOS custom firmware based on Android 6.0.1 Marshmallow is now available for the smatphone. Bringing tons of custom features and tweaks, this ROM is a weekly firmware, so there might be still be some bugs. While this is a weekly build, you might want to try the ROMas not many Marshmallow based ROMs have been released for Samsung Galaxy S4 I337. Following these steps you will be able to updateSamsung Galaxy S4 model I337 to Android 6.0.1 Marshmallow.

- Some of the best Android 6 Marshmallow custom ROMs

Remember, this is NOT anofficial Android 6.0.1Marshmallowrelease from AT&T. This means that flashing the custom firmware will void your device's warranty.

Before you update Galaxy S4I337 to Android 6.0.1:

Backup any important datafrom your Samsung Galaxy S4 SGH-i337 as a complete wipe will be required during the flashing process.Enable USB debugging option on your device:Settings>DevelopmentOptions>USB debugging.Samsung Galaxy S4 I337 must berooted, unlocked and installed with a recovery tool likeTWRPorCWM.Your device must be charged to at least 60% of power.

Note:this tutorial is focused on AT&T SamsungGalaxy S4I337; kindly do not try this guide on other Android &Samsungdevices.

Update Galaxy S4I337 to Android6.0.1 OctOS:

Required files:

DownloadtheOctOS Android 6.0.1 Marshmallowfor Galaxy S4

Once you download and save the zip file on your computer, here are the steps to proceed:

ConnectGalaxyS4to your computer using a USB cable and copy the zip file to your phone’s SD card.Disconnect the USB cord andpower off yourGalaxy S4.Boot it into recovery mode bypressing and holdingVolume Up+Home+Powerbuttons together.Wipe data task: from CWM recovery menu, selectwipe data / factory resetand confirm the process.From recovery menu, selectinstall zip from sdcardfollowed bychoose zip from sdcard.Locate the OctOSAndroid 6.0.1ROMand confirm the flashing process.Return back to main recovery menu and reboot your GalaxyS4 I337 into the new custom ROM. First boot takes a good 5 minutes so please be patient.Ta da!

Don't forget to comment if you are happy with this one-of-the-first Marshmallow basedROM for AT&T Galaxy S4.

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