Beiruting News

iOS 9.3.1 contains a great secret feature...   
iOS 9.3.1 can run Night Shift and Low Power Mode simultaneously, as long as you follow a particular combination.
There's how you fix it:
1- Enable Low Power Mode via 'Settings -> Battery'
2- Start Siri and say "Enable Night Shift". Siri will reply: "In order to turn on Night Shift, I'll have to turn off Low Power Mode. Shall I continue?"
3- Reply "Yes" and press the sleep button before the response is confirmed. You will then hear Siri's confirmation beep
4- Unlock your iPhone and, providing you did step 3 correctly, you will see both Night Shift and Low Power Mode are enabled at the same time

Interestingly this secret feature appears to be more a handy bug in iOS 9.3.1 than something Apple created by design.