Smartphones with a high refresh rate (90/120Hz) display panels are becoming more of a thing now. To play certain games and videos, for smoother scrolling, better UI rendering and to reduce eye fatigue requires a higher refresh rate display. OnePlus 7 Pro, Asus ROG Phone, Razer Phone 2, Nubia Red Magic 3, etc. features a higher 90Hz display panel.
Xiaomi Mi 9 smartphone has some seriously impressive specifications and features. Mi 9 has a standard 60Hz AMOLED display panel, but this Mod will change its display refresh rate to 84Hz. All you need to flash the modified DTBO image file via ADB, TWRP or Lanthanum System Toolbox app.
DTBO (device – tree – blob – overlays) partition stores various parameters of the hardware components, like the display panel of a smartphone. By modifying the display parameter, you can change Mi 9’s display refresh rate to 84Hz.
Thanks to XDA senior member G4B33 and MIUI forum member for sharing the information. It requires unlocked bootloader and root access on Mi 9.
Contents
How to Change Mi 9 Display Refresh Rate to 84Hz
[su_note note_color=”#fff9bf”]Disclaimer: Please follow this guide at your own risk. We can’t take responsibility for anything that goes wrong. This guide is intended for technically talented users only.
[/su_note]
1. Download the dbto.img, Lanthanum System Toolbox APK file from this XDA thread.
2. Install Lanthanum System Toolbox app and open it
3. Select partition settings from the hamburger menu
4. Select dtbo, make a backup of it (Export image)
5. Select dtbo again, click flash image, and choose the dtbo.img file
6. Reboot your phone. You should see the changes immediately after the restart.
Note that, since this is not an official method, there might have certain issues. Green tint in the dark gray colors, overexposed color, etc. are few reported issues.
How to restore original 60Hz refresh rate
If you want to go back to default, flash your backed up dtbo image file using the same method given above.
[Source – 1, 2]
