CallApp

1. Download and open CallApp, grant phone and contacts permissions, and set it as your default dialer if prompted. 2. Sign in or verify your number to sync contacts and enable caller ID across incoming and outgoing calls. 3. Open Settings to enable Spam Protection, choose block rules for unknown and suspected spam, and add numbers to your blacklist or whitelist. 4. Use the smart dialer to search by name or number and place calls; check caller ID on incoming calls to decide whether to answer, reject, or block. 5. Review call history, mark numbers as spam, organize contacts, and back up preferences to keep protection consistent across devices.