Recently I've dropped my iPhone 7 and I noticed the bottom right area got warm when in use, so I contacted Apple support via chat and they offered me to take diagnostic test of my phone. Everything seems to work just fine (besides the warmness), but after they took the diagnostic test, it shows that my "bluetooth sensor" is having problems. My initial thought was the speaker got problems (because it sits in the area that got warm). So I tested out my bluetooth several times and it works perfectly fine. They told me to bring to my local service provider (as there are no Apple stores in my country), but I don't want to mess up with my device especially the warranty. Has anyone experienced this? The diagnostic test seems to give new problem to my iPhone....