This is Huawei Mediapad T1 8.0 Pro (T1-821L) official update firmware. It requires no tool for flashing, but to be flashed via SDcard.
Flashing instructions available immediately after download options. Do report broken links, if any!
Mediapad T1 8.0 Pro (T1-821L) ROM – Download
How to flash
For clean and correct installation of this firmware package, follow the instructions available here https://www.leakite.com/2016/07/how-to-flash-huawei-updateapp-stock.html
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