Verizon is set to unveil new tools in the heightened offensive against robocalls.

The nation’s largest wireless provider is expected to provide free spam alerting and robocall blocking tools for wireless customers who have smartphones that can support the features, including Android and iPhones.

Verizon announced the features two months ago and said it had identified nearly 300 million numbers linked to spam and robocalling. The provider is expected to have more information about how to get and use the app by the end of this week, Forbes reported.