And a SIM is just a smaller iso7816 smart card. Never understood why Visa and Mastercard (or its members) never turned on the stored value (“offline credit”) p

And a SIM is just a smaller iso7816 smart card. Never understood why Visa and Mastercard (or its members) never turned on the stored value (“offline credit”) portions of the spec. Plenty of retailers that just “go dark” when the payment/telco network goes down. But maybe that’s an IT issue/decision. (At least that’s how I think it works: the card keeps track of how many unsigned offline transactions have happened and eventually says “no more” until it gets a ping back from the payment network)