It's likely much more than half because I don't see a guy working on his laptop and switching on his phone to be able to answer messages, I personally never use social medias on a phone, it's annoying to type.
I prefer most communication to happen from my phone. Keeps the laptop less distracting when I don’t talk with people so much on it. Except Slack on work computer. That one I keep open and use for talking with coworkers. But that’s because it’s part of the job, and also relevant for me and them to be talking about things we are working on.