I use Android Oreo. Easy connectivity would be great
Must have a good mic. I am often in meetings in noisy places and clarity is important
Whether it's a earphone or earbud doesn't matter much to me. What is important is portability & ease of use. What I mean by that: traditional earphones with cables are a hassle because when you're constantly traveling, taking them in and out and untangling is such an annoyance. I have tried wireless earphones before and because it's not truly wireless, having to charge it is not as easy as a earbud which is in a solid case and again, easy to store and charge.