Verizon 102HW

I picked up this device on eBay, listed as unlocked. I went to test it out today, but it’s just not working properly. When I log into the modem's UI, under the connection settings, it shows AT&T (roaming), but there's no actual connection. I hit the connect button, but nothing happens; the indicator turns green for a split second and then immediately goes back to grey like before. Even the modem's built-in display still says "roaming." I tried swapping in an AT&T SIM card—which is perfectly fine and shouldn't trigger any roaming issues—but I still can't load any webpages. Would a firmware reinstall actually help here, assuming that's even possible!?

I ordered it from this link: http://www.ebay.com/itm/282161449376...;3AMEBIDX%3AIT