[hobarrera]

Huh, that's interesting.

I guess this also varies tremendously by region. WhatsApp completely dominates non-work communication in Argentina; we don't use SMS, nor phone calls, and FB is pretty much is second place.

AFAIK, in the US people actually use SMS a lot, and I'm sure it's a bit different everywhere else.

More on topic though; you can use Messenger without an FB account and still find people by username.