OnePlus
Turn Off the Phone Completely auf OnePlus
Do Not Disturb, the concentration mode and similar rest profiles only mute notifications and calls. They do not stop calls and messages from arriving; the phone still connects to the network, stays reachable for allowed contacts, and keeps background apps running.
To stop the phone from receiving calls or messages entirely, you need to power it down. Press and hold the power button ➔ Tap on Power off. The power menu appears within a second, and confirming Power off cuts all radio connections, closes running apps and stops every notification sound.
A full shutdown makes sense when you need complete silence, want to save battery over a longer stretch, or are troubleshooting a frozen device. It is the wrong choice if you only want quiet hours, since a phone that is off will not deliver time-sensitive alerts, third-party alarms or emergency broadcasts until you switch it back on.
Once the phone is off, you miss every call and message until you turn it on again. Do Not Disturb, by comparison, still lets urgent notifications through if you set exceptions, which makes it the better fit for short breaks rather than a full restart.