Android provides features for notification with default sound. If you get any notification it’s give a sound for get notification for example mail notifications, text message, social media, alerts etc.
In android provides power button for turn off and turn on device. Some cases if your power button is not responding or you have broken power button then you face problem to power off or power on.
In android provides to add contacts via google account and without google account (normally).You can set ringing, photos for different- different contacts in android. If we want to hide particular contact then we can hide particular contacts or calle
In android by default keyboard provides predictive text and show correction suggestions. It’s a very help full for us on typing, because it’s save time and give us to correction suggestions keywords.