Last year we bought a couple of 1GB data SIMs to use in a Three Mifi unit for our trip to France. Not used it since then and just checked it out ready for our trip to France in a couple of weeks and find that I can still connect to the internet through it using the original SIM (only 100MB left though). Seems to still work after 9 months and not the 1 month it was supposed to. Anyone else find this?