I definitely would not want to have my phone as a key. I can keep my car key safely attached inside by backpack but I use my phone all the time when walking (ta

I definitely would not want to have my phone as a key. I can keep my car key safely attached inside by backpack but I use my phone all the time when walking (taking pictures, OS maps, audiobooks) so its much more likely that I would damage/lose my phone than lose my car key.