[itsMohsinK]

I dont understand why 'Do Not Disturb' option is getting automatically switch on on my 7+ , any idea how to fix it?

[Jeroen7]

Is that on fixed times? Maybe an accessability scheme that sets it?

[itsMohsinK]

No fixed time sometimes at night sometimes at afternoon dunno why!

[TwitchyPuppy]

If it's set up like this, it'll automatically switch on.

[itsMohsinK]

These are my settings check:

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[Sherry_B]

These are my settings check:

Yeah, something is wonky there. Try enabling them all and then disabling again. If you still have problems with it, set up an appointment with the Genius Bar at your local Apple store. They'll be able to help you. Or, you can try factory resetting the phone to rule out any type of buggy or corrupted system file. Fresh system files will generally fix oddities.