Remember the connections do drop with regularity. That's not a bug. I won't discuss it since it's been done so many times.
With that aside I've used such dongles on Windows 7 and the http://virtualrouter.codeplex.com/ as well as those routers that you plug the dongle into.
HOWEVER as more folk leaned harder on cellular networks, you see the results.
my company's Verizon T1s and DSl backups are all down b/c Sandy knocked everything down in the area.
we have a Verizon data usb dongle, we installed it on a Windows Server 2003 and tried to connect, we got nothing.
next we tried to install it on a windows 7 laptop, that works, BUT when we connect to the LAN via a cable to share that data connection the Verizon data connection got disconnected.
we tested the scenario with a tethered android phone, again the PC gets a connection, but when we plug to the lan it drops.
the lan nic settings are:
gw-172.16.1.50 (we pointed it to itself, but the regular setup also didnt work)
dns-172.16.1.50 (we pointed it to itself, but the regular setup also didnt work)
when adding the verizon data usb dongle or tethered phone a 2nd connection is created along with the exisiting LAN nic connection.
how do we get these to work and share them with other pc's on the network?
[we covered the basics:
"server" =verizon data connected pc with above ip
"clinet" = lan nic with a diff ip, same nm, gw/dns pointing to server above, enabled connection sharing, nada]
we also downloaded and installed freeproxy 4.1 and upon that the Verizon data connecting disconnected too, till we uninstalled the free proxy.