Dell Mobile Broadband Manager Not Communicating Apr 2026

Windows 10/11: Action Center → Airplane mode must be OFF.

Issue: You launch Dell Mobile Broadband Manager (DMBM) or Dell ControlPoint Connection Manager, and you see the error: "Not Communicating," "No Device Found," or "Radio is Off." The application cannot initialize the mobile broadband card (often a DW55xx series from Sierra Wireless or Ericsson). dell mobile broadband manager not communicating

If you’ve completed all steps and still see "Not Communicating," the WWAN card has likely failed. Replacement DW5811e cards are available for $20–30 on eBay. Windows 10/11: Action Center → Airplane mode must be OFF

Some Dell utilities override radio state. Open Dell Power Manager → Wireless tab → Ensure WWAN is Enabled . " "No Device Found

Open HyperTerminal or Putty on the Modem COM port (e.g., COM5) at 115200 baud. Send: