Counterclockwise: the relationship between dual SIM slots and microSD cards

SIM - the Subscriber Identity Module - is an ever-shrinking card that acts as your access pass to the carrier's cell network. Once it was used to store your phone book and text messages, now it's under threat of extinction. Embedded SIM solutions have started cropping up, mostly in smartwatches where a maker can make a reasonable claim that dropping the card slot is a space-saving solution. But Google put an eSIM in its second-gen Pixel phones (used to connect to the Google Fi network), and Apple has its own "Apple SIM" embedded in iPads. Apple, in particular, does some iffy stuff where...

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