Not merely the alarm not working, many other problems still occur, such as flashlight not working in iOS 11, airdrop not working on iOS 11, or even screen recording won't work in iOS 11, which are all caused by hardware & software conflicts or improper settings.

Have you ever also encountered the same issue like demonstrated above? Got late and late for work because of your iPhone alarm not working on iOS 11 in the morning? It does bother a lot. Really thanks.' - A question from an iPhone users Is there any effective way to fix iOS 11 alarm not working problem? Neither do I want to go back to iOS 10.

'Why my iPhone alarm not working after updating to iOS 11 usually, which makes me upset as I was late for work twice in a week.