Yes, Square relies on the headphone jack.

As for me, I'm keeping my 6S for a while. What will I replace it with? Honestly, I don't know. I'll probably get whatever the latest iPhone is when it's available. I might also take a good hard look at the Google Pixel1 phones when they come out.

All I can tell you is that I'll be looking for the best phone for my needs at the time, which is what I always tell others to do. In the end, they're all rounded rectangles with a glass front and a bunch of circuitry inside. Silly to get all religious about it. :-)

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  1. Replacement for the Nexus series.