G1553651224304, Apr 18, 2019 : Hello, I am new to One Plus phones as I bought a OP3 , at very first I installed Android Nougat update it was fine until a black screen appears with a small linux penguin in the middle.I tried to get in the recovery mode but nothing happens. So I get to the Mobile Repair shop and there he said to me that the software was corrupted, and I did not had any backup. He managed to re install Android Marshmallow in it again and after that all of my data was wiped with new software. The phone is working fine right now, I am just afraid to Install update again. Can someone tell me why does this happened?