My apartment building has app operated entrances, and I was completely reliant on someone else with a working phone to let me in multiple times. They said they got rid of standard fobs because of people apparently lose them often, but it have never once lost mine, yet I've had two phones kick the bucket on me, multiple times where my battery died, and a few times where it got softbricked after a failed update. Just this week I had the app reset itself after an overhaul, making me go through the setup process again while standing outside in a heatwave. Given that I'm especially heat sensitive, I'm surprised I didn't pass out.