If the device remains locked: You cannot install a custom recovery or ROM. The paper stops here for locked devices without a paid unlock solution.
It is safer to boot TWRP first before flashing it permanently to ensure compatibility. Command: fastboot boot twrp.img (Replace twrp.img with the actual filename). huawei matepad 104 custom rom install
Because bootloader unlocking is nearly impossible for most MatePad 10.4 owners, the community has shifted toward "soft" solutions that mimic the benefits of a custom ROM without the risk of "bricking" the device: If the device remains locked: You cannot install