Are you getting the dreaded sim error or WMC671 error on your Verizon USB device? I'm willing to bet it's on your laptop and maybe every once in a while after a reboot or a hibernate the device works again. Maybe you get the error and it still connects to the internet anyway? Maybe you've figured out one of your USB ports works with it, but the others don't? It's not a very cordless approach, but get a powered USB hub (a USB hub that has a standard wall-outlet type power cord) and try that. It seems this little dongle is drawing just a little too much power and isn't negotiating with the laptop's USB power management very well.