I’m oncall today for a 5m response SLO service. I went out for lunch and went shopping. I carried my work phone and laptop around with me.
I’m not expected to “pull” responsibilities from a chat room; pages are pushed to me. If someone needs to get ahold of me they are supposed to page me, not message me.
Edit: that being said, oncall outside of business hours does limit my activities, such as hiking, biking, camping, traveling, and I would of course appreciate 100% time or time and a half.