Serial is a universal data interface that we've had for decades. Don't need RS232 on my phone though.

Boy it would be nice however.

On that note, I remember reading how some phones were able to use the headphone jack as a serial debug port, which is pretty neat.

	▲	artisinal 4 hours ago \| parent [-]
		The Apple 30-pin connector on the iPod and early iPhones had serial! That is how your car radio could display the name of the current track. https://theapplewiki.com/wiki/30-pin_Connector