Released September 20, Apple's mainstream 2019 iPhone comes with a 6.1" LCD touchscreen, dual cameras, and six available colors. Successor to the iPhone XR.
Several things can cause the iPhone keeps turning itself off problem such as a glitch in the system, software or app malfunction, flat battery, failed battery, and water damage.
Any repairs done recently? By yourself or others.
by Markus Norstrøm