iPhone 6s Overheats and Bricks

Everything was fine, I have my iPhone for over 2 years already ( I don't expect a phone this expensive to die like that so soon), I just updated the new version 11.2.1 and for several hours all was fine, suddenly it start to overheat, so I did turn it off, and then on and again and it went to emergency mode 1, 2, 3, 4, times and more, I reset all settings, I even downloaded an earlier version I went back to that versin, nothing I bring it back to the new version, nothing, I killed all the apps on my iphone, I turn off all the camera hdr, live photos, I turned off all GPS settings all that could be, and not even that, it keeps telling me that is overheated and will just work in emergencies, but I cant get back to the iphone, it just bricks.

Does anybody have this problem with their phones, what is this? does anyone have an answer for this?