Problem with phone calls is that they are synchronous, yet quite often things callers want to resolve can be resolved asynchronously (= via text messages & emails), but you can handle those when it's convenient.
So at least I'm glad that most of my contacts send me messages in whichever messenger is convenient. We can always agree to call each other if we feel like it will be more convenient, but then it's a much different feeling then just randomly calling. Also personally 100% of "random calls" I got within last 3 years were telemarketers, so guess how often I answer the phone :-D
Edit: in general I agree strongly that dropping off social networks and in general reducing notifications noise to a minimum (and not only on smart phone but everywhere) does wonders, strongly recommend.