Oppo
Block a Phone Number from Call History auf Oppo
ColorOS keeps a built-in blacklist that filters both calls and messages from numbers you add to it. Once a number lands on this list, incoming calls get rejected and texts are moved out of your main inbox without further alerts reaching you the usual way.
The fastest way to add an entry is straight from your Call history, since you don't need to save the number as a contact first. Here's the verified path:
Tap on Phone ➔ Tap and hold an Entry ➔ Tap on Block/report spam ➔ Tap on Block
By default, ColorOS still shows a short notification whenever a blocked number calls or texts you, confirming that it was blocked rather than delivered. This is meant as a safeguard so you don't miss something important from a number you blocked by mistake.
If you'd rather not see that notification at all, you can turn it off separately in the blocking settings. Keep in mind that blocking through Call history only works for numbers that already show up in your recent calls or messages. For a number you've never been contacted by, you'll need to add it manually through the blacklist settings instead.
This method also doesn't silence a contact temporarily; it blocks the number outright until you remove it from the list again.