Silicon Valley tech workers tend to use latest-and-greatest iPhones. Hot emerging markets with a lot of money to be made by those SV tech employers tend to use low end Androids. This diminishes the utility of employees as beta testers. I could totally see my own employer forcing some engineers to use Android for that reason.
TL;DR: We heard a sensational rumor, went on a speculative ramble with it, and left the overwhelming contrary evidence for last:<p>>That said, we checked Twitter activity from several Facebook executives, ... all of whom are still shown to be using iPhones ...
I've think I've heard something like employees of certain divisions being required (but not strictly enforced?) to use Android phones, simply because it is a different UX when you're not using the latest and greatest hardware.<p>Ex. using AR / heavy GPU processing face filter effects on a few year old Android. There's a significant number of these out there in the world.<p>Mark doesn't strike me as being so petty as to banishing iPhones from Facebook.