I purchased a Latitude E6220 with a 4G WWAN modem (the DW5800). My intention was to support DirectAccess, i.e. Microsoft's clientless VPN, but unfortunately I have not found any way to get the IPv6 protocol installed on the device.

I've searched Verizon Wireless, Dell and Novatel Wireless forums without any success. I'd love to hear from anyone who does manage to get this working.