There are several steps you can take to block a number on a landline phone and reduce the amount of spam calls you receive.

When a blacklisted call comes in, the phone rings just once, then drops the call. Anonymous Call Blocking for AT&T Landline For this call blocker, you need phone service from AT&T with Caller ID.

To block a number on an iPhone or Android, you can use your device's Phone app. To block a number on a landline, contact your service provider or use a call-blocking device.

The company already provided call blocking to mobile customers who downloaded the AT &T Call Protect app or opted in via their account settings. Landline customers had also been able to opt in.

It seems our phones ring off the hook with unwanted calls. Here is how to block unwanted calls for free.

Bad news AT&T customers - looks like you lead the way when it comes receiving those annoying robocalls.

Here’s how: Block calls from your smartphone Your phone has built-in security tools to protect you from scammers, and you should get to know one of the most basic: the block function.