Borrow a soon to be ex friend's I thingie and set the date to Jan 1, 1970
Take a 64-bit iOS device—iPhone 5S or newer, iPad Air or newer, iPad Mini 2 or newer, sixth generation iPod touch or newer—laboriously set its date to January 1, 1970, and reboot. Congratulations: you now have a shiny piece of high-tech hardware that's stuck at the boot screen, showing nothing more than the Apple logo... forever.
64-bit iPhones and iPads get stuck in a loop when set to January 1, 1970 | Ars Technica
But wait, there is a fix for this "feature"
Let the battery die, or remove and re-install, then all is well, ------maybe