We purchased a number of HP Pavilion dm1 (dm1-2010nr) netbooks from Verizon which came with 64-bit Windows 7 Home Premium. We need 32-bit Windows 7 Pro for our software. After doing a clean install of 32-bit Windows (formating the partition with the original Windows install, leaving the other partitions alone), & installing the drivers & software from the HP website, the HP un2420 Wireless modem would not connect to Verizon using the VZ Access Manager software. The VZ Access Manager software recognised the card as an HP un2420, but couldn't configure it. Instead of displaying Mobile Broadband (EV-RevA), it would show an error message "Network registration denied". The Options menu in VZAM did not display an Activation option. Even restoring the machine with the Factory Image Restore did not restore functionality of the wireless card.
To resolve this, open the VZ Access Manager and go to Option>Network Selection & change the Network Mode to CDMA. Click Yes to the popup window that says, "Are you sure you want to change the network mode?". It should then be able to complete the configuration & display the "Activation" option under Options. Click on Options>Activation and complete the activation process.
BTW, pressing CTRL-T while in VZAM will bring up a terminal window that can be used to test whether the modem is working. The modem should respond to an AT command with OK & it should return a bunch of info to an AT&V command. ATDT#777 should return something like CONNECTED 3100000, not NO CARRIER.
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