You are able to check your usage in either of the following ways:
Select the Usagebutton in VZAccess Manager (when the device is connected via USB Cable).
VZAccess Manager is the software that should be downloaded to your computer which is used to connect your device to the web. If you do not have this software you are able to download it via the following link:
Log into My Verizonto check usage (when the device is connected via Wi-Fi).
If you are already registered, you can simply login and you will see your usage on the My Verizon Home Screen. If the MiFi is the only device on the account and not registered, you can register this device as well. You can access registration via the following link:
You will enter in the 10 digit mobile number for your MiFi device and you will be able to receive the temporary password text message to the device by selecting the Text tab from within VZAccess Manager (this will not work if you are using a Mac based computer).