Get Android 5.1 Lollipop on Galaxy S3 I9300 with OmniROM

The latest version of Android Lollipop has been announced just a few days ago by Google. Nexus 6 and Nexus 9 are the first devices that got this update before others. It is expected that other manufacturers such as Samsung and HTC etc will also update their devices soon to Android 5.1 Lollipop. One of the old devices Galaxy S3 that was released in 2012 and came with 1 GB of RAM, this amount of RAM was not enough to get upcoming software updates and it was also somewhat ignored by Samsung. But the developers worked hard to create awesome ROMs based on the latest version of Android OS. That is the reason that this device received multiple ROMs based on Android 5.0 Lollipop previously.

Just like CyanogenMod12, OmniROM is also one of the most popular custom ROMs and being a Galaxy S3 owner you’ll be happy to know that OmniROM is now available to the Galaxy S3 which is based on Android 5.1 Lollipop, developed by “mcgi5sr2” (Senior XDA Member). So if you want to get this OmniROM on your Galaxy S3 then here is a step-by-step guide to install Android 5.1 Lollipop via OmniROM Alpha build on Samsung Galaxy S3.

Keep in mind that this OmniROM is in alpha stage, thus some bugs are expected and you may face some not functioning features but according to users, most of the features are working fine except the Codec issue which is affecting video recording.


This guide containing the Android 5.1 Lollipop OmniROM is only working with Galaxy S3 I9300 (International Variant). Do not try to install this ROM on any other or incorrect variant. As a result the device might gets bricked. So check the model number of your device first.

Warning: will not be held responsible for any kind of damage or mishap occurred to your Galaxy S3 I9300 during or after the flashing process of OmniROM featuring Android 5.1 Lollipop. Proceed at your own risk.

Before Getting Started:

  • Make a proper backup of all your existing data and settings on your Galaxy S3 before proceeding to the installation guide using a custom recovery.
  • Download and install correct Samsung Galaxy S3 I9300 USB Drivers on the PC.
  • Enable USB Debugging on the S3 by navigating to Settings > About Phone.
  • The Galaxy S3 should be rooted having the latest version of custom recovery installed on it.
  • Make sure that the battery level of your Galaxy S3 is above 80%.

Required Files:

Steps to Update Galaxy S3 to Android 5.1 Lollipop with OmniROM Alpha Build:

Follow the given instructions to install the OmniROM on Galaxy S3:

Step No 1:- First, download Android 5.1 Alpha OmniROM ( for Galaxy S3 (I9300) on the desktop of the PC.

Step No 2:- Plug your device to the PC using its USB data cable and mount its USB memory storage.

Step No 3:- Transfer Android 5.1 Alpha OmniROM .zip file which you’ve already downloaded from the above link, to the root folder of your SD card on the phone.

Step No 4:- Unplug the Galaxy S3 (I9300) from the PC and power it OFF in order to boot into Recovery Mode.

Step No 5:- Power ON the device while pressing and holding Volume Up + Home + Power buttons at the same time to enter into Recovery Mode.

Step No 6:- While your device is now in CWM Recovery, perform wipe data/factory reset, wipe cache partition and wipe dalvik cache also by navigating to Advanced > Wipe Dalvik Cache.

Note:- wipe dalvik cache will help you to prevent boot loops and other errors while ROM installation.

Step No 7:- Go back to the main Recovery Menu and choose install zip from SD card → choose zip from sdcard.

Step No 8:- Navigate to the Android 5.1 Alpha OmniROM .zip file which you’ve already transferred to the SD card of your device previously. Select the ROM .zip file using the Power button and confirm the installation to begin.

Step No 9:- Navigate to +++++Go Back+++++ once the installation is completed. From Recovery Menu, reboot your device by selecting reboot system now.

Your Galaxy S3 I9300 will be rebooted and may take about 4 to 5 minutes to boot for the first time after installation.

Done! You’ve successfully updated Galaxy S3 I9300 to Android 5.1 Lollipop via OmniROM alpha build.

Let us know in the comments section below if you have any query or problem regarding the above tutorial to install OmniROM alpha based on Android 5.1 Lollipop on your Galaxy S3.


If your Galaxy S3 experience boot loop or gets stuck on booting animation after flashing the ROM then perform wipe cache partition and wipe dalvik cache for a few times before rebooting the Galaxy S3.


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