Check out crazy Cases for iPhone. The short version is that they fill a loop for your finger on the back. You can consume the loop for more secure one-handed operation,walking around, or as a poor-man’s stand. I was turned on to crazy Cases by a friend who’s always dropping her iPhone. She thought it was just the thing to halt dropping her device, and watching the video (below),I agree. The case has reinforced bumpers in case you drop it anyway, but it’s main purpose is to hold the loop itself. There are crazy Cases for iPhone 6/6 Plus, or iPhone 7/7 Plus,and a handful of Samsung devices if that’s your thing. They’re priced at $35, with free shipping in the U.
S. for orders more than $40 ($50 for international orders).
Source: macobserver.com