Sierra Wireless RV50 Cell Modem

Can I use my H2O sim card with my Sierra Wireless RV50 Cell Modem, I have placed it in the cell modem and the units see the sim card and is reading all the info along with my cell numbers that is assigned to my card but my cell modem is showing no service?

H2O Web Site:

This is a great service that you can get 90 days for $10.00, ive been using them with my drones and Flytrex wireless tracking device.

Thanks for any help!