Unless God has installed phone service in Heaven, I can't call/text my grandparents. I can't even tell you how many years it has been since I've talked to a grandparent on the phone since the last living one was in a nursing home for a few years prior to passing.
My parents don't text, so I've never texted them. Hmmmm, not sure when I talked to them last on the phone either. I've talked to them in person a few times this week, but not on the phone. We live a mile apart, so they often just stop in here and I do the same.
Mom, I speak to almost daily. Dad has been dead for the past 11 yrs.
Mom's mom, I speak to grandma once a week or every two weeks since mom is there about half the week.
I used to speak to dad's mom every other week, but now we are in the process of relocating to go care for her. When she is released from the rehabilitation center after she "graduates" her physical therapy, she is no longer allowed to live alone.