I'm not responsible for any damage, follow this procedure at your own risk
the Redmi A5 is an entry-level smartphone released in March 2025, based on Android 15 Go Edition. it is powered by a Unisoc T7250 processor and comes with 4GB of RAM and 128GB of storage.
for a few months, I did a lot of research trying to find a way to unlock the Bootloader and gain root access. browsing some posts on XDA Developers, I discovered that the T7250 chipset is vulnerable to CVE-2022-38694, a flaw that allows code execution with BootROM privileges. knowing this, I decided to take the risk and perform the unlock procedure on my Redmi A5.
Windows OS.
SPD and WinUSB/LibUSB drivers.
you must enable Developer Mode and keep the options "USB Debugging" and "OEM Unlock" turned on. after following this procedure, you must put your cellphone into preloader mode (the mode in which the device starts before the operating system, low level).
to enter Preloader mode, you must turn off your device and then press the volume down (-) button + power button until your computer recognizes it in the Windows Device Manager.
having completed the first step, you should now download the exploit for the processor. (Unisoc):
DOWNLOAD
with the exploit in hand, you must connect your smartphone to your computer via USB, run the unlock_autopatch_9230.bat file and wait until the process is done.
your device is expected to reboot a few times, and once the process is complete, an unlocked padlock should appear on the boot logo. (means it was succesfully unlocked).
⚠️ (THIS WILL DELETE ALL DATA) in case of a brick, create a fix.bat file in the same folder as the exploit, and paste the following content into the file.
setlocal enabledelayedexpansion
spd_dump exec_addr 0x65015f08 fdl fdl1-dl.bin 0x65000800 fdl fdl2-dl.bin 0x9efffe00 exec r boot w splloader splloader.bin w uboot uboot.bin w misc misc-wipe.bin reset
pauserepeat the process to enter preloader mode and run fix.bat.