How to Root Nothing Phone 3 using KernelSU

This guide will show you how to root Nothing Phone 3 by modifying the stock boot image with a KernelSU-enabled kernel. KernelSU only allows approved apps to use su, so other apps won’t detect root access.

Important: Rooting can void your warranty and may brick your device if done wrong. Make sure you have the correct files for Nothing Phone 3 and back up your data first.

Requirements

KernelSU build for Nothing Phone 3 must match your device kernel
Magiskboot tool
Unlocked bootloader
Stock boot.img that matches your current firmware
fastboot tool and correct USB drivers
Contact Me for rooting help using KernelSU (not free)

Overview

We will unpack the stock boot.img, replace the kernel with a KernelSU-enabled kernel, repack it, and then install it with fastboot. After that, KernelSU will be active and su will only be available to apps you approve.

Steps

Get the stock boot.img for Nothing Phone 3 and keep a data backup of it.
Unpack the boot image (Linux example):
```
magiskboot unpack boot.img
```
Download and extract the correct KernelSU build for Nothing Phone 3.
Replace the kernel in the unpacked files with the KernelSU Image:
```
mv -f Image kernel
```
Repack the boot image:
```
magiskboot repack boot.img
```

Flash the new boot image:

fastboot install boot boot.img
fastboot reboot

After flashing

If the phone doesn’t boot, install back your original boot.img.
Once booted, Install KernelSU App & verify KernelSU is working.
Only update KernelSU from trusted sources.

Tip: Keep your stock boot.img safe so you can recover it if something goes wrong.

You follow this guide at your own risk. The author is not responsible for any damage.