A free program for Android, by Contacts Plus team.

Caller ID+ is a free app for blocking unwanted calls and messages from unknown numbers. This app is a fast, easy, and effective way to block unwanted calls and text messages.

What can you do with Caller ID+?

It is the best way to protect yourself from spam and scam calls.

It also allows you to block incoming calls from specific numbers. It is a true all-in-one contacts, dialer, SMS, and call log app that helps you block unwanted people via caller ID & block.