Do any of you use Mifi?

[mifiwifihifive]

How does it work?

I can see EE do a 30gb 30 day option BUT it's really unclear if you can just keep the same device and pay for the month you want (like a monthly top up) of you only get to use it for a month and then have to buy another the next time you want Mifi for a month?

Tia.

I've got one and just top it up via a card. You have to register it when you get it and to see how much data you have left.

Cool. Thank you.