Nice work, but not the point
Apparently the chips that make up a SIM have become powerful enough to sport teenie little extra programs that can do quite a lot, including leveraging a teenie extra bit of RF hardware stuffed in the same teenie chunk of plastic.
This means two things: One, it can be horribly abused. Two, there is no longer any excuse for not making systems so that they're much harder to abuse.
Most new such mobile systems, including identity and payment systems, near field stuff, oyster type cards, RFIDed passports, even simple entry systems, are positively shoddy with sensitive personal user data. Especially banks are notorious in expecting you not to look beyond their expensive corporate fronts. And instead of reinventing the wheel ever more squarely, we could employ some math of the ``zero knowledge proofs'' type to hide work with that sensitive information without spreading it to all and sundry, wirelessly. And now we have clear indications that the hardware, down to the smallest SIM, is up to it.
So there no longer is any excuse to fuck up as much as we, our banks, our carriers, and our governments, do.
It's the one with the wires sticking out the arms, thanks.