Well, to add my experience with Samsung and my GS4...I sent my phone into Samsung because it was overheating to the point that I could not hold it when I was talking on the phone and it was up using the the internet you could forget it. The phone was under warranty so the replaced the plug in port for a "defect" and returned the phone. The phone continued to run hot and 2 weeks later when I was on the phone, my call was dropped. I didn't think anything about it until I went to make another call. When I did, the phone wouldn't work. It was very hot so I took the phone into Sprint to see if they could fix it. The noticed that I had an internal crack running from the top left corner like a spider web down to about middle of the phone. It was on the inner screen so I hadn't noticed it. They said at the the time that it was because the phone was hot and it was obvious that there was no evidence of damage to the phone. (my phone was still under warranty). I called Samsung, explained the situation and sent my phone back for repair. They called me and told me that the damage was due to "ABUSE" and that I owed them $167 if I wanted my phone fixed. After 30 minutes of talking and going up the corporate line, I finally talked to someone who told me "I can tell you that we will fix it for free but I would be lying to you because we would still send you a bill". The would not let me speak to anyone in the repair area who had classified my phone as "abused" nor would he pull up my previous work order and see that my phone had just been there for repairs.