Just a warning for everybody living in hot climate. Today I had a very strange issue that led me to believe that the phone was defective. I am in a part of the world with very hot weather - 40C on a daily basis. I went outside and walked around and took the phone out of my pocket at some point, only to find out that I was unable to unlock the screen. It was totally unresponsive. Even when I long-pressed the power button and the menu showed up to allow to power off, restart etc., I was unable to choose any of the options. After many tries I unlocked it, rebooted several times, defrosted all apps, uninstalled the most recent ones cleared cache, etc. Nothing helped. I was sure that the firmware was screwed up and backed up my stuff and did a hard reset. The issue persisted. I then returned to my office, put the phone on charger and let it stay in an air-conditioned room. After 15 minutes the issue was gone and has not come back since. I assume it was the heat as I restored everything from before the problem started and nothing caused it again.