I didn't hear a mention of this watch being usable for phone calls but if that's in the cards, then I guess that's a legitimate application, though I don't see how it would work. You hold your wrist up to your ear? Sounds painful. Is it somehow better than using an earbud? If you don't want to walk around wearing an earbud like a Borg when you're not on a call, maybe they could put an earbud holder onto the watchband. The watch could be shaped to accomodate the earbud and maybe even recharge it, if it's shaped like an Airpod.