Hello, i have one lg g3 for 1y and 2 months, i've heard some issues this phones can have like, overheating, mine was overheating when i had lot app open and wi-fi etc, one day he restarted by itself and the second time he restarted appear dead pixels. I sent do the repair assistant saying that i have those 2 years warranty and they after check up the phone they sent me back saying that i have broken display, what can i do now? they say it's my fault