Install One UI 7 (Android 15) on Samsung Galaxy S9, S9+ and Note 9 with AI Features

If you own a Samsung Galaxy S9, S9+, or Note 9 with the Exynos 9810 processor and want to upgrade to the latest One UI 7 (Android 15) with AI features, this guide will walk you through the process step-by-step.This is not made for daily use and has many bugs,you can read a quick look here

Prerequisites

• A Windows PC with Odin installed
• TWRP Recovery for your device model
• An external USB drive
• One UI 7 system files (system.img, vendor.img, kernel)
• USB OTG Adapter (for mounting USB storage in TWRP)
• Ensure your device has at least 80% battery

Download Links

One UI 7 + Repartitioner + kernel

TWRP recovery

Repartition Cleaner

Step-by-Step Guide to Install One UI 7

Step 1: Enable OEM Unlocking

1. Go to Settings > About Phone > Software Information.
2. Tap Build Number 7 times to enable Developer Options.
3. Go back to Settings > Developer Options.
4. Enable OEM Unlocking and USB Debugging.
5. Power off your device.

Step 2: Install TWRP Recovery Using Odin

1. Boot your phone into Download Mode by holding Volume Down + Bixby + Power.
2. Connect your phone to the PC via USB.
3. Open Odin on your PC and load the TWRP .tar file into the AP slot.
4. Click Start and wait for the installation to finish.
5. Once complete, immediately boot into TWRP by pressing Volume Up + Bixby + Power.

Step 3: Prepare for Flashing One UI 7

1. Copy the Repartition files, extracted ROM zip with system.img and vendor.img, and Kernel zips to an external USB drive.
2. Connect the USB drive to your phone via OTG Adapter.
3. In TWRP, go to Mount > Enable USB Storage.

Step 4: Flash System Repartitioner

1. In TWRP, go to Install > Select the Repartitioner.zip from USB storage.
2. Swipe to confirm flash.
3. This will resize system partitions to accommodate One UI 7.

Step 5: Flash Cleaner and Reboot

1. In TWRP, go to Install > Select Cleaner.zip.
2. Swipe to confirm flash.
3. Your phone will automatically reboot.

Step 6: Flash One UI 7 System and Vendor Files

1. Boot back into TWRP Recovery.
2. Go to Install > Select Images.
3. Select system.img and flash it to System Partition.
4. Select vendor.img and flash it to Vendor Partition.

Step 7: Flash the Kernel

1. In TWRP, go to Install
2. Flash the DS-ACK permissive kernel included
3. The kernel will detect the device model and install the appropriate version.

Step 8: Reboot into One UI 7

1. Once the kernel flash is complete, go back to the main TWRP screen.
2. Tap Reboot > System.
3. The phone will boot into One UI 7 (Android 15) with AI enhancements.

Final Setup

Once your phone boots up, go through the initial setup process and explore the new AI-powered features in One UI 7.

For fixing the brightness run this command in adb shell (14300 means max brightness) you can lower the value as your choice

echo 14300 > /sys/class/backlight/panel/brightness

Conclusion

Upgrading your Samsung Galaxy S9, S9+, or Note 9 to One UI 7 (Android 15) unlocks new features and improves performance. By following this guide carefully, you can enjoy a refreshed experience on your older device. If you run into any issues, ensure you followed all steps correctly and consider visiting relevant forums for troubleshooting.

Keywords: Samsung Galaxy S9 One UI 7, Galaxy Note 9 Android 15 Update, Install One UI 7 on Galaxy S9+, TWRP Recovery for Galaxy S9, Flash One UI 7 Exynos 9810