More than the technical aspect of it, you may have less jerks in your life (lucky you).

There a people who will take any occasion to phone. I had a client who phoned 5 min after sending a mail to check if I saw it. Some would wait a few hours before phoning.

After a while, more than any change in what I use, completely blocking work calls outside of the duty team and ignoring mails/message/ whatever when off was the most straightforward way.

I don’t even have to hide my phone number anymore, it’s just dropped and they have to go to the support team if it’s really something important.