The Surface family includes Surface Pro, Surface Laptop, and other Surface products. Surface is designed to help organizations, students, and consumers be more productive.
And some added info.... I'm still hoping at some point someone will come along and have a solution...
This morning I changed the setting of the adapter and disabled the setting "Selective suspend". It seemed to go better and I even had quite a long time of internet using the HSPA+ network. Then all of a sudden it was dead again :(
The thing is: as soon as internet is gone the connection is still active and enabled; there is just no internet on the connection. And in most cases: disabling the adapter will just cause device manager to get stuck. Rebooting the Surface get stuck in a lot of cases as well... It ends up by me holding the power button.
The driver version of the adapter is 10.0.10586.0 Not sure if newer drivers are available, but in the package that I found here: https://www.microsoft.com/en-us/download/details.aspx?id=49041 no drivers for the modem were included.