Download and install Dell Dell Wireless 5540 HSPA Mini-Card Device - driver id 1532833
Dell Latitude E6410 Windows 7 Driver Installation Guide | Dell Barbados
556-10772 Mobile Broadband : Internal Dell Wireless 5540 Card 3G/HSDPA SIM Not Inclded!! Latitude and Precision only (E5510 or E5500), { Compatible with --> E4200, E4310, E5410, E5510, E6410, E6510 }