Possible way to check for crossflash-protection on MTK devices


Triitzi

Members
8 Jun 2026
4
15
Currently, Mediatek ROMs seem to feature a fastboot flag that can be used to check for cross-flash protection
fastboot oem flash_check cn
Checking this command on a Poco X8 Pro Max and a Xiaomi 15T outputs:
(bootloader) allowed
However, according to another user on XDA, the device that was first shipped with such flash-protection, the Poco X7 Pro outputs:
D:\platform-tools>fastboot devices
BQ6TYTNJKF5XJRYD fastboot

D:\platform-tools>fastboot oem flash_check cn
FAILED (remote: 'non-CN devices do not allow flashing CN ROMs.')
fastboot: error: Command failed

I, as well as some other users on this forum and XDA, have succesfully managed to flash CN firmware on a Poco X8 Pro Max, suggesting that the crossflash-protection is not active on this device. The fastboot flag seems to only exist on Mediatek devices as of now.
It would be very helpful if some people coming across this post and own a Mediatek device could check if this fastboot flag exists on their devices and if they could post the output. Do not attempt to flash CN firmware. I do not want to be responsible for any hardbricked devices.