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By Alyssa Newcomb

The phone rings and an unfamiliar number comes up on the caller ID. Do you answer it?

Google is rolling out a revamped phone app to its Nexus and Android One users, promising to warn them if that suspicious phone number is a potential robocall.

Users can then choose to block or report an unwanted call from the number on the screen, making it easy to ignore if the person or robot on the other end of the line makes a future attempt.

Google has updated its phone app with spam protection.Google

While Google's update is limited to only some Android devices, there are other similar apps that can help weed out those pesky interruptions.

Truecaller, which is available for iOS, Android, and Windows devices, draws from its bank of more than two billion phone numbers to identify unknown callers and block spam phone calls. The app is available for iOS, Android and Windows Devices.

PrivacyStar for Android is another option, allowing users to screen their calls and follow up with a Do Not Call Complaint filing.

Federal Communications Commission Chairman Tom Wheeler wrote in a letter posted online last week that "robocalls and telemarketing calls are currently the number one source of consumer complaints at the FCC."

Read More: RoboKiller: Developers of App That Quashes Robocalls Win $25K from FTC