Update Galaxy S3 with Android 5.1 Lollipop Alpha OmniROM Mcgi5sr2, Senior XDA member, has released an update to install Android 5.1 Lollipop OS on Galaxy S3 I9300 via the OmniROM alpha version. Except some minor issues with the codec, everything is working perfectly well on OmniROM. How to Update Samsung Galaxy S3 with Android 5.1 Lollipop Alpha OmniROM Those who would like to flash the alpha build on OmniROM presenting Android 5.1 on Galaxy S3 I9300 can proceed with the following steps, but be cautious while doing it. Note: Make sure that you’ve a backup of all important data in the Smartphone by using any custom recovery option. Enable USB Debugging option and Android SDK on your Smartphone for connecting it with PC. You should have at least 60% of battery backup while doing the below procedures. Unlock the bootloader for Galaxy S3 I9300. For going ahead with custom build installation, your Smartphone should run properly on recently updated custom recovery modes like CWM or TWRP. Steps to Update Galaxy S3 with Android 5.1 Lollipop Alpha OmniROM: Step-1: You can proceed by downloading Android 5.1 alpha OmniROM on your PC. Step-2: With the help of a USB cord, connect your Smartphone with PC. Move the downloaded files to the internal memory storage of your device. Make sure that the files are moved to the root folder. Step-3: Remove the device from the PC and turn it off. Step-4: Go to the recovery mode. For doing that, press and hold the Volume Up, Home and Power buttons together. Step-5: Select wipe data/ factory reset for the enabling of whole data wipe. In the Recovery Mode, you can click on the Power button to select it. Step-6: In a similar way, carry on with the cache wipe by navigating to wipe cache option. Step-7: Create a wipe of dalvik cache. For doing this, move to advanced and click on wipe dalvik cache. Step-8: Go back to the main recovery menu. Click on install zip from sdcard and opt for choose zip from sdcard. Use the Volume keys for navigating towards OmniROM. Confirm the installation process by clicking on the Power button Step-9: When the installation process is completed, return to the custom recovery screen and reboot the phone by selecting reboot system now. You can move back to custom recovery option and reboot your device once the installation process has been done successfully. That’s all; now you can use your Galaxy S3 running on Android 5.1 Lollipop through OmniROM alpha build.