I use Lebara Surf on my tablet for the times I'm travelling with it. Does anyone know of a way to check how much of the 120mb per month usage is remaining and when it resets? i can install tracking software on the device, but i also occasionally swap the SIM around, so was looking for a method to get the info directly.

When I had this addon, I could see the usage in my Lebara account. Obviously, they screwed up their site a few months back (they call it upgrade but who they try fooling?) but I guess it might still be there. Perhaps, on the Dashboard? In the original version it was somewhere on the left side, sorry, don't have screenshots. But I do have a quite detailed record about my usage based on that information.

With regard to when it gets reset, see their site: http://www.lebara.ch/lebara-surf.