On this page you can download the Knock You Down ringtone for free. For an Android device, download the version in .MP3 format. A ringtone in .M4R format is suitable for iPhone, iPad and other iOS devices.To view other Keri Hilson Feat. Kanye West & Ne-Yo ringtones, click on his name under the page title. Also, listen to the related ringtones at the bottom of the page.