It has now become popular “in some parts” not to answer the phone, and even cancel voice mail forcing the person who needs to establish contact to sms/text, send email or use whatsup.
While this communicational expedience appears to be a “choice” of those wishing to “maximize” their use of time, I caution how globally scalable this is in the following cases:
1-When clients or bosses or family expect accessibility all the time, even if this may appear “unreasonable”.
2-When the accepted etiquette is such that one can always say “I”ll get back to you and call you later”, but nevertheless this message must be given both on line and personally…to show enough care that you are “almost” always available.
3) In cultures where plans mean less that emergencies.