If you set Date And Time to January 1, 1970, on iPhone, iPad, and iPod touch, it will cause these iOS device fails to boot. This bug was found by some users in Reddit forum and it was confirmed by iClarified. They found that this bug is only happening on iOS devices which have a 64bit processor, starting from A7 chip to the latest A9 on iPhone 6s and A9X on iPad Pro. The bug does not occur on iOS devices with a 32bit processor like A6 on iPhone 5 or below.
The test to show this bug is shown on a video. The iPhone 6 Plus cannot reboot the system after they set Date And Time to January 1, 1970. At this moment, the restore procedure cannot solve this issue. The only way to make it back to normal is to disconnect the battery from the logic board. This procedure needs to be done by a technician. It is recommended to bring it to Apple Store or the Apple authorized service provider to fix it.
This bug is diagnosed as a bug on UNIX kernel, a foundation of the iOS.
“The bug is suspected to be related to the UNIX timestamp epoch. Due to time-zone settings, the date is causing a bit-underflow, which crashes the kernel.”
Apple has not responded to this issue yet. We hope they aware and that they will fix it with the upcoming iOS update.
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