To update the for Windows 10, you must use legacy Windows 7 drivers, as HP does not provide official native support for this hardware on Windows 10. Driver Details & Compatibility
: Sites like Driver Scape and DriverIdentifier host various versions, including 2.0.7.1 which is specifically noted as having 64-bit support for Windows 10. Solved: HP un2420 Mobile Broadband Module - 7678243 hp un2420 mobile broadband module driver windows 10 upd
Choose "Try recommended settings" or manually select "Windows 7" compatibility. Open Device Manager . To update the for Windows 10, you must
(Then reboot. You’ll see “Test Mode” watermark.) Open Device Manager
provide legacy versions specifically for Windows 10 32-bit and 64-bit systems. HP un2420 Mobile Broadband Module - HP Support Community
If the cellular signal doesn't appear immediately, some users have found success by installing related modules from newer models, such as the HP un2430 Sierra Wireless driver using similar compatibility workarounds.