What Is The Call Barring Site

When you activate call barring, your phone sends a secret code (like **33*PIN# ) to your carrier’s tower. The tower remembers: “For this phone number, block all incoming international calls.”

This means even if you swap your SIM into a different phone, the barring stays active. It’s attached to you , not the device. Depending on your carrier (and your country), you can bar calls with surgical precision. Here is the menu of options: what is the call barring

On : Open the Phone app > Menu (three dots) > Settings > Calling accounts > Choose your SIM > Additional settings > Call barring . When you activate call barring, your phone sends