Same issue I am having and many others are having.
Verizon tech support is as usual worthless. They wont admit any issues and want to charge you $150 to get a contractor to come visit your house and tell you everything looks fine, or replace the canteena. They wont credit your account, they wont waive the fee, this seems like its a profit center for them!
The equipment or network is not at all ready for this and the technology needs another year or so to be a viable consumer product. I had better luck with a 4G USB dongle. Now I am locked into a 2 year contract with a piece of junk I need to reboot everyday to get it to work right.