If I had to do it for more than 5min (which is never since I'm near table/desk/bed/armrest/carseat/horizontal plane of some sort 90% of my life) I'd hold it res

If I had to do it for more than 5min (which is never since I'm near table/desk/bed/armrest/carseat/horizontal plane of some sort 90% of my life) I'd hold it resting on my palm/forearm with my fingers curled around it's top. Thumb and 3 finger on one side is not secure nor sustainable.