Download and Install LineageOS 15.1 on Redmi 3s | Android 8.1 Oreo

Download and Install LineageOS 15.1 On Redmi 3S/3S Prime/3X | Android 8.1 Oreo: Redmi 3S was launched in 2016, June. Redmi 3S comes with Android 6.0.1 (Marshmallow) out of the box which is upgradable to Android 7.0 Nougat. It is packed with the 5.0-inch display, 13MP Primary camera, and 5MP front-facing camera powered by Octa-core 1.4 GHz Cortex-A53 Snapdragon 430 processor with 3GB of RAM and 4100 mAh battery.

Recently Google released Android 8.1 Oreo for Nexus and Pixel devices. With the release of new Android 8.1 Oreo, the parallel thing that happens is the development of the Custom ROM which essentially acts as a wrapper to the underlying Android version. After the huge hit of LineageOS 14.1, LineageOS team started building new Custom OS LineageOS 15.1. LineageOS 15.1 is packed with all new features of Android 8.1 Oreo.

As the popular CyanogenMod collapsed, developers from the same team started new Custom ROM LineageOS. LineageOS 14.1 is a huge Hit, it was installed over 1 million times in 170+ models. With Android 8.1 Oreo released last month the race to make the next customised OS has hit off. Google has always strived to make it every next release better than the previous. Follow the guide below to Update Redmi 3S/3S Prime/3X to Android 8.1 Oreo Via LineageOS 15.1

As this is the initial stage of development, the official builds are not yet released. This build may not work as a daily driver as you expect. As official builds are under development, you can wait until official release. But if you can to test this LineageOS 15.1 on Redmi 3S/3S Prime/3X and taste the latest Android 8.1 Oreo features. Follow the below step by step guide to install LineageOS 15.1 on Redmi 3S/3S Prime/3X.

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What’s working:

  • Boots
  • RIL (Calls, SMS, Data)
  • Wi-Fi
  • Bluetooth
  • Camera
  • Video Playback
  • Audio
  • LED
  • Etc

Known issues:

  • VoLTE
  • More you tell me.
  • Flash SuperSU for root access
  • Flash the mentioned 8.1 GApps for now in download section.


  • Make sure the bootloader on your device is unlocked, and your device is rooted, and you have a custom recovery installed.
  • Make sure your device has more than 50% battery.

Disclaimer: is not responsible for any damage happened to your device(s) while following this guide, Proceed at your own risk.


Steps to install LineageOS 15.1 on Redmi 3S/3S Prime/3X | Android 8.1 Oreo

  • Make sure your device is rooted and have the latest TWRP recovery installed. (Check the Pre-Requirement Section Above)
  • First, download the files from the above link.
  • Now transfer the downloaded files to the internal storage of your device.
  • Now reboot to the TWRP recovery by holding your power and volume down buttons together for a few seconds.
  • Take a backup by selecting the option from the home screen and then your data and cache from the recovery menu.
  • Now select install and then browse for the downloaded ROM file and then select it. Next flash the Gapps file and then Magisk (optional).
Once the flashing process is completed, reboot your phone and you will be booted into LineageOS 15.1 Based on Android Oreo 8.1.

Rootmygalaxy a.k.a RMG was started in 2015 with a solo goal of Helping users with easy How-to guides. Slowly the website started sharing exclusive Leaks and Tech News. In these 5 years, we have been credited by the likes of Forbes, CNBC, Gizmodo, TechCrunch, Engadget, Android Authority, GSM Arena and many others. Want to know more about us? Check out our About Us page or connect with us Via Twitter, Facebook, Youtube or Telegram.

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