Integrate modem in DELL Latitude E5520

Hello everybody. I buy a new DELL Latitude E5520. After deleting the window i see that it has a modem integrated wich can allowed to connect to internet. Unfortanately i try lot of things to make it working with my ubuntu 16.04 LTS but i failed.
And i want to know if anyone succeed with this. Thanks for responding.

I’ve moved this to the category because this site isn’t designed to take tech support questions. Sorry. I’d recommend using one of the official support channels listed on the Finding Help page.