by tapping the "HarmonyOS version" or "Build number" seven times in settings to tweak system behavior without a full ROM flash. Solid Paper / Screen Protectors If your "solid paper" query refers to a paper-like screen protector for drawing/writing:
Unlike Xiaomi or OnePlus, Huawei does not allow bootloader unlocking. To install a custom ROM on the MatePad 10.4, you must unlock the bootloader. Currently, there is that reliably cracks the Kirin 710A / 820 bootloader on HarmonyOS 3+. huawei matepad 104 custom rom cracked