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In most places the magstrip is disabled (both on the cards and in the readers) because it's insecure and there was a lot of low-effort cloning going around.

The hardware to clone magstripe cards is shockingly cheap and easy to get hold of.

I was tickled a few years ago when Samsung tried to roll out mobile payments in the US and had to include a kind of hardware magnetic stripe emulator in their phones, chip & pin is nowhere near ubiquitous yet.

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