The Huawei MediaPad X1 7.0 originally launched with Android 4.2 (Jelly Bean) and later received an official update to Android 5.0 (Lollipop) via Huawei's EMUI 3.0 or 3.1 interface. Because this is an older device, you typically have two ways to install the update: an automatic over-the-air (OTA) update or a manual "dload" installation. Method 1: Automatic Over-the-Air (OTA) Update
If Method 2 fails, you can use the Firmware Finder for Huawei app to locate official OTA packages. Huawei MediaPad X1 4.4.2 KitKat update (HOWTO) huawei mediapad x1 70 update lollipop install
So, the pressing question remains: Can you install Lollipop on the Huawei MediaPad X1 7.0? And if so, how? The Huawei MediaPad X1 7
Once you have the unlock code (16–20 digits): Warranty Void : Unlocking the bootloader and flashing
Storage: Use a blank microSD card with at least 2GB of free space. Manual Installation Steps
Warning: Do not use random ROMs from untrusted websites. Stick to XDA-Developers threads for the Huawei MediaPad X1 (codename: 7D-501u).
If the server responds with "No updates available" or "Your system is up to date" (while you are still on KitKat), you must proceed to manual installation.