Search the "General Tablet" or specific MediaPad threads. XDA is the most reputable source for verified developers.
This is the biggest hurdle for Huawei devices. You may need to use third-party paid tools like DC-Unlocker since official support has ended. Install TWRP Recovery: You must flash a custom recovery like huawei bg2-u01 custom rom
These provide a "Pure Android" experience similar to a Google Pixel. They are typically the most lightweight and stable options for older hardware. Modified EMUI Builds: Search the "General Tablet" or specific MediaPad threads
Good news – MediaTek devices from this era do not require an official bootloader unlock code. SP Flash Tool bypasses this entirely. However, you do need a custom recovery. You may need to use third-party paid tools
Custom ROMs for the Huawei MediaPad T3 7 (BG2-U01) : What You Need to Know Huawei MediaPad T3 7 (BG2-U01)