 "Radio" received positive reviews from contemporary music critics, who generally praised Knowles's departure from her usual R&B style.Some of them also complimented the believability as well as the originality of the song and chose it as the standout track of "I Am... Sasha Fierce".In September 2009, "Radio" was used to promote Dutch radio station Radio 538, and it subsequently charted for six weeks on the Dutch Top 40 chart, where it peaked at number 14.