[izzydata]

At least in the US people still only use SMS or a program that can be installed on a computer. I've never used WhatsApp, Telegram or Signal.

The only thing right now that I need my Android phone for is Duo Mobile authentication to log into my work computer.

[Hackbraten]

In Europe, where SMS used to be ridiculously expensive until the early 2010s, WhatsApp usage is absolutely endemic to the point that many businesses use it as their primary means of communication. It also has a quasi-monopoly on group messaging among friends and relatives.