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:
manage to unlock the bootloader, you might be able to flash a GSI. These are universal ROMs meant to work on any device that supports Project Treble. You can check your device's compatibility using the Treble Info App HarmonyOS vs. EMUI: Most MatePad 10.4 models have been updated to , which is even more locked down than the original EMUI. 3. Better Alternatives (Without Flashing) huawei matepad 104 custom rom install
This paper provides a detailed technical guide for installing Custom ROMs on the Huawei MatePad 10.4 series. Due to Huawei’s unique bootloader locking mechanisms and the absence of official unlock codes, modifying the system software on these devices presents significant challenges compared to mainstream Android tablets. This document covers device identification, the theoretical framework of Huawei's security architecture, the unlocking process (where applicable), Recovery installation, and the ROM flashing procedure. It concludes with risk assessment and troubleshooting methodologies. Because bootloader unlocking is nearly impossible for most