Dell, Get your website support pages in order. The correct device driver for the DW 5808 wireless broadband modem card for a Precision M4800 is Communications_Driver_2KF2M_WN_3.12.1310.4003_A00, not what's listed in the drivers support page.

For Windows 10,

I see for the DW5808e in the Modem/Communications category and not Network category

Communications_Driver_FXRMY_WN32_6.19.4382.502_A07.EXE   Jan. 17, 2016

and

Communications_Driver_KT1RD_WN32_6.14.4316.502_A06.EXE  Nov. 5, 2015