That is to say: reports have emerged that restarting an iPhone after setting the clock back to January 1, 1970 will trigger an unforgiving glitch that makes it deader than disco.
Why the 1970 iPhone bug happens
Even though this iPhone date reset glitch seems to be random, it makes sense in that it messes with your phone or tablet’s timing mechanism. It sees that particular date as a negative time value.
The device can still go into Recovery Mode, but the only real fix for this error requires making an appointment with an Apple store, or taking the phone apart.
We weren’t brave (read: foolhardy) enough to test this feature out firsthand, however, several Reddit and Twitter users can confirm the time-travelling bug.
There’s even a video demonstration of the 1970 iPhone error, courtesy of Tech by Zach Straley.
YouTube : https://www.youtube.com/watch?v=fY-ahR1R6IE&feature=youtu.be