Make sure you installed the latest version of Magisk.
If you can tell me the exact currently running on your Redmi 9A , I can help you find the specific firmware link to extract the boot.img . Would you prefer to use Magisk or KernelSU ? Share public link
without a PC is possible in 2026 by using a second Android device to send commands via USB OTG. This replaces the traditional computer for flashing the "patched" boot image. root redmi 9a without pc patched
Download the official Xiaomi Stock ROM matching your exact build string.
Since you are not using a PC, you need a method to flash the magisk_patched.img to the boot partition. Make sure you installed the latest version of Magisk
Incorrectly flashing files can temporarily or permanently brick your phone.
Choose and navigate to your extracted boot.img . Share public link without a PC is possible
Tap the button (or toggle from zips to images). Navigate to your patched Magisk file and select it.