[hardware problem] LTE module not working(em 7305)

[yannig]

gps and LTE connexion on the toughpad FZ-M1 rely on a Sierra wireless em-7305 module, and i can't get it to work. after installing mbim packages, it shows up, buti can't initialize it an d have a connexion.
the horware is out of cause : tested with windows7 it works (but then i don't).
has someone a tip  to get it work ?