
Block an unknown number on iPhone.
Go to your iPhone Settings
Click on Phone
Select the Silent Unknown Calls option
By default, the box is inactive; click on the cursor to activate it.
Block an unknown number on Android
- Press the “More options” section (3 vertical dots)
- Go to “Settings” on your Android.
- Select “Block** Numbers”.
- Slide the toggle switch to activate “Block unknown callers”.
For more information, please refer to this Swisscom help file and in particular the Mobile sections
Unwanted calls/numbers: Callfilter - Help | Swisscom
“On apprend parfois plus d'une défaite que d'une victoire” — José Raúl Capablanca
Black Mamba But that’s not even close to the solution we’re talking about. It’s about blocking on the part of the operator, not the user. What’s more, the solution you describe is not really a solution for the iPhone. With the setting you describe, it affects all phone numbers that are not stored on the mobile phone. The speech in my post refers exclusively to anonymous calls.