Android
Allow or Block Calls in Do Not Disturb auf Android
Do Not Disturb silences every notification by default, and that includes phone calls. Android decides who can still reach you through a separate filter inside the People category, which is easy to overlook if you only toggle Do Not Disturb on or off.
That filter has four states: Starred contacts, all saved Contacts, Anyone, or None. If it is set to None, every call gets blocked no matter who is calling, which is the most common reason for missed calls during Do Not Disturb.
Where to change the call filter
Open Settings ➔ Sound & vibration ➔ Do Not Disturb ➔ People ➔ Calls and select one of the four options: Starred contacts, Contacts, Anyone or None.
Starred contacts only lets through people you marked as favorites, which works well for family or close colleagues. Contacts allows anyone saved in your address book, useful if you want to screen out unknown numbers but still catch clients or coworkers.
Anyone disables the call filter completely while other Do Not Disturb restrictions, like notification banners, stay active. None keeps calls silent no matter who is calling, which fits well during sleep hours or focused work blocks.
If you only need an exception for one urgent situation, temporarily turning Do Not Disturb off is often faster than changing this filter.