Dell Wireless 5560 WWAN is probably un-usable now as 3G networks across the globe shutdown.
Dell Wireless 5560 WWAN Mobile Broadband Driver
File: Network_Driver_CFFVD_WN32_8.2.4.0_A00.EXE
3ac23bd4e8b0ccff4f66d4884be59188d257369629bc0ad23798822da62195a9