I don't call any of my family members, if they need me they usually call. In which case they leave a message and I try to get back to them asap, which is usually a few days. Same with my friends, but everyone is use to dealing with me and they do not get offended.
As far as I can recall, I've never called my grandparents. I don't even have their phone number. I don't call any other relatives either, nor do they call me, but I do email my mom occasionally. I see my relatives on holidays when I visit. Nobody has expressed any displeasure with that arrangement to me.
Never. Both my grandfathers have passed away. My paternal grandmother is in her 90's and can't remember ten minutes ago so there's really no point. My maternal grandmother only speaks Farsi and I don't. She comes to stay with us once a year and trust me thas enough to deal with.
My paternal grandparents are dead, but I keep in touch every once in a while with my maternal grandparents. I call my grandma about once every two months. It's awkward and not fun, but I feel obligated to because she's so nice and always wants me to call her.
My grandparents are all deceased now. My parents divorced when I was about two years old and my mother and I moved in with my maternal grandparents. They both died while we were living with them. I rarely called my paternal grandparents during that time, but we visited them frequently.
Later, when my grandfather's health was bad, my paternal grandparents moved in with my father. Grandpa died about a year later. I moved in with my dad and grandmother for a short time after college. My grandmother developed Alzheimer's and Parkinson's a few years later. I called her frequently and visited about every weekend (if only for an hour or so) during that time. She passed away last year.
My maternal grandparents died before I was born. My paternal grandfather died just a few weeks after I started my Freshman year in High School, and my paternal grandmother died 4 years ago. I never was really close to my paternal grandparents. That side of the family was highly dysfunctional and dad pretty much kept us away from them. I didn't meet my paternal grandparents until I was 11 so I only knew my grandfather for only 4 years. I did use to go over to mow the yard for my grandmother when I was attending the community college, but she end up moving in with my stupid Aunt and Uncle that lived in eastern Iowa when I started to go to the 4 year college. I never talked with my grandmother much after that due to dad not wanting us to have anything to do with his brother and his stupid wife.
My maternal grandfather died 6 years ago. I call my grandmother occasionally, and I visited her frequently back when we all lived in the same state.
I've never been close with my paternal grandparents so I know very little about them. I'm not even sure if they're still alive.