There are other similar projects on the market currently which use SIM cards in one way or another. See:
http://www.fuzo.com/You cannot use a SIM card to store large amounts of data like that. If you mean a SD card, it's just another example you have no clue about technology.
Of course there will be many adjustments and alterations from now until a final end-product, but as of now it is simply a product concept seeking feedback on. No scams involved.
You have a working merchant account asking for $250 in non-reversible currency.