The OP states "because it uses about 1gb per half hour", I doubt very much the problem lies with Verizon. That is a phenomenal rate of data just for surfing and emails. If Verizon was going to overrate your usage,as some have claimed, they would certainly be smart enough to do it in smaller increments and not to the point that your monthly amount is consumed in a matter of hours. How dumb to think otherwise.
Have you contacted Verizon about the problem?
I have a Jetpack 4260L on Verizon 4G LTE network and only use around 3.5GB in 30 days of surfing and emails.
ryoung