You must unlock your bootloader to allow custom partitions.
The Huawei MediaPad T1 7.0 is not a device for the faint of heart when it comes to custom ROMs. The reality is that there are no readily available, flash-and-forget custom ROMs for this tablet. However, this does not mean you are stuck with a slow, bloated device. By following the roadmap in this article, you can transform the user experience: huawei mediapad t1 70 custom rom top
Use TWRP to make a complete Nandroid backup of your current system. Charge: Ensure your tablet is charged to at least 70%. Step-by-Step Installation Guide You must unlock your bootloader to allow custom partitions