I sure hope so. If I get an SMS/RCS from anyone on my android device I typically freak out, just as I freak out when people call me on my phone number.

Phone service protocols feel very outdated to me and are prone to scams, which I get from time to time on SMS, but I'd say never on whatsapp, or at least I can't recall any scam attempts.

And country. All I use is SMS. If anything else is used by people I know it is mostly Facebook Messenger or Hangouts. But SMS is still a clear #1.