For certain variants of the MediaPad X1 where Huawei never released an official stable Lollipop update, custom ROMs (such as unofficial CyanogenMod 12 or LineageOS builds) are the alternative. This method requires an unlocked bootloader and custom recovery. Step 1: Install TWRP Recovery
Go to Settings > About Tablet > Model Number . Ensure you download software intended for your specific variant (e.g., 7D-501u or 7D-501L). huawei mediapad x1 70 update lollipop install