Try patching the boot.img again within the Magisk app. How to Verify Root Once your device reboots: Open the Magisk or KernelSU app. If you see "Installed," the rooting was successful. Download a Root Checker app from the Play Store to confirm.

Launch Magisk and tap the button next to the Magisk label at the top. Choose the option Select and Patch a File .

Rooting Redmi 9A Without a PC Using a Patched Boot Image: The Complete Technical Guide

Your Redmi 9A bootloader must be unlocked.

To patch a boot image file ( boot.img ), you must extract it directly from the firmware package currently running on your phone.

If your phone fails to boot, you likely patched a boot.img from a firmware version that did not match your system exactly. To fix this, boot into Fastboot mode and flash the original, unpatched boot.img using the second-phone method to restore system stability.