mobile broadband cards are usually locked to a specific carrier   unless you were told that the card was unlocked, you won't be able to use it with Sprint
Bought a 5700 card off ebay.. installed it and it worked great - except the drivers they had me download were for verizon. I went back to Dell and found the Sprint drivers, uninstalled the Verizon one and installed the Sprint driver. Now it does not detect the device. I  have uninstalled and reinstalled, restarted, deleted nonexistent com ports and data interfaces (which keep coming back with the installation, but always say drivers are not installed for this device... Any ideas where to look for the hangup? I am assuming something did not uninstall correctly.. Thanks! WJones
5700 Broadband 'not detected' 