Install One UI 2.1 Alexis Custom ROM on Samsung Galaxy S9 / S9+, Note 9

This guide will help you to update your Samsung Galaxy S9 / S9+ Galaxy Note 9 to One UI 2.1

The latest One UI 2.1 update is now available for the Samsung Galaxy S9 / S9+ Galaxy Note 9. This update is possible via Alexis Custom ROM for these high-end specs devices. Samsung keeps on updating its 2018 series phones to Android 10, but the firmware of these devices isn’t the latest One UI 2.1, and users are bound to stick to the older One UI 1. Some of the users aren’t irritated and they might want to experience the latest software that is present on S20.

Relax, if you don’t have that one, then you can thank a developer who has come up with this One UI 2.1 custom ROM port for the Galaxy S9/S9+ and Note 9. If you want to learn and know more about it, install it. This is the first debut of One UI 2.1 on the Galaxy S20 phone series. But, just after this, Samsung has brought it to the older version too as S9 and Note 9 series which officially run the Android 10 software. You can Update Samsung Galaxy S9, S9+, and Note 9 to One UI 2.1 from this development step by Samsung. One UI 2.1 ROM is available and users can install it using the tutorial we have provided below.

One UI 2.1 Update Alexis Custom ROM

Flash One UI 2.1 Update to Samsung Galaxy S9, S9+ and Note 9

This is a custom ROM port that mainly focuses on porting over Galaxy S20 features. This is not the Android Open Source Project and is based on the latest Google’s mobile OS. It has used Android 10 as its base firmware and then upgraded it. Alexis builds and integrates additional functions.

For features and changes, here is a complete list as provided by the developer:

  • Based on Android 10
  • Odexed, Hardly Debloated, and added some tweaks for best performance and better battery.
  • Added some tweaks in order to have the best smoothness and general performance!
  • Aroma Installer
  • Disabled RMM Lock.
  • Google Pay working (Hide it with Magisk)
  • Secure Folder working
  • A lot of S20 Apps Ported!!!
  • Share Live from S20!
  • PRO VIDEO Mode from S20.
  • Single Take fully working.
  • Night mode on the front camera.
  • New Live Focus with new backgrounds.
  • New MY FILTER option in the camera.
  • Night mode on hyperlapse.
  • New Photo Editor.
  • Enabled Dolby on Game.
  • Option to put apps on deep sleep (will save a lot of battery).
  • Music Share working (you have to enable it with Activity Launcher
  • Power key in the notification panel.
  • Samsung App Lock.
  • iOS 13.2 Emoji’s selectable in the aroma.
  • S10 Multiple Wallpapers.
  • New Good Lock 2020 selectable in the aroma
  • Dual SIM/SD tray lock fix

Alexis ROM brings various new own features that make the experience even better. Aroma support for installation also enables users to cherry-pick the functionality they want.


Before proceeding to the given guide, make sure that your device is running on the latest Android stock firmware. We strongly advise you to first install the latest official update before going ahead if you are on a custom ROM.


Since the ROM is based on official firmware, there aren’t any serious bugs or glitches. However, AndroidBlog will not be responsible for any kind of damage occurred to your device during or after the installation process. Proceed at your own risk.


For Galaxy Note 9:
Download Alexis One UI 2.1 Update ROM
Download One UI Fix ZIP Package

For Galaxy S9 and Galaxy S9 Plus:
Download Alexis One UI 2.1 ROM

How to Install One UI 2.1 Custom ROM on Samsung Galaxy S9, Galaxy S9+ and Note 9

Follow the given detailed instructions to update Samsung Galaxy S9, S9 Plus & Note 9 to Alexis 1.3 custom ROM with One UI 2.1 to get the new Galaxy S20 features.

Step 1. First, download the One UI 2.1 update custom ROM zipped file for your Galaxy phone from the download section.

Note: Please note that there is an additional One UI fix file for Galaxy Note 9.

Step 2. Install Samsung USB Drivers on your PC and connect it using its USB data cable.

Step 3. Now, copy the downloaded files to the phone and reboot into custom recovery. In order to boot your phone into custom recovery, Power OFF your device. Now, Power it ON while pressing the Power + Bixby + Volume Up buttons at the same time until the first boot logo shows.

Step 4. While your phone is now in custom recovery, choose to install zip package and browse to the ROM file where you have copied in the above step.

Note: Please keep in mind that this ROM uses Aroma Installer so you can find various to choose from. Set it up as you like. Do not select TTS if you want Google Assistant or Bixby.

Step 5. Finally, reboot your phone once the installation completes.

Step 6. Your phone will take 15 to 20 minutes to boot up for the first time in the new system.

Note: If you are using this guide for Galaxy Note 9 then once the phone boot up, reboot into recovery, flash One UI fix package and then reboot.

Done! These were the complete steps to install One UI 2.1 Alexis Custom ROM on Samsung Galaxy S9 / S9+ Galaxy Note 9. Enjoy One UI 2.1 update functionality after booting and setting it up.

Do let us know about your experience in the comments section below if you have any queries.

Zoha Khan

I am an Asian writer who has been writing for the past three years. I have written articles, blogs, poems, short stories and many more. Writing is my passion and I very well know how to turn imaginations into fascinating words that none can deny or ignore.

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