If you can manage to get pass the fact that
Cassie is singing on a track that samples Mobb Deep's classic song "Shook Ones Pt. 2" then you'll probably find that
"Radio" isn't too bad of a song. Yes, Cassie's singing is borderline annoying and the song probably wouldn't have made it without Fabolous' verse, but overall it's kind of catchy. Although I think they have the production to thank for that.
Fabolous kicks "Radio" off with a quick verse and I think his verse should have been added either later in the song or he should have been given a second verse. Because once that verse is over the momentum of the song kind of dies out. It might sound harsh, but Cassie doesn't have a strong voice and it becomes quite unlistenable after about two minutes...probably less.