Use Fongo Mobile how often to keep active?

[Maxwell Smart]

I use the Fongo Mobile app on my android smartphone. I don't use the mobile app often, say once a month, typically when I call long distance.
Do I have to use my Fongo mobile account within a certain time-frame or else will the Fongo system deem my account as being inactive and shut it down?
i.e. if I don't use it for 2 months, will my account get shut down? I don't want to lose my number etc.... Thanks!

[Jake]

Once every 3 months, although they 'should' send you an email to warn you first.
http://support.fongo.com/entries/230027 ... -cancelled