i m sharing my experience,which i dont find in this forume.
and fond after many search in all forumes.
if u have mediapad s7-931u.
Along with lock,google acount,pattern locked or hang on logo,
there is no hard reset for this tab
download this file which supported only s7-931u
remmember its not support for s7-931w
Downloads – Huawei Device Co., Ltd..
no want any flasher for this just want 4gb sd card
procedure is included above fle