It sounds like your friend is talking about the recurring questions about cell phone use and cancer due to close proximity to microwave emmissions. There are still no definitive studies, i.e., data, that prove the low level microwave emmissions induce cancer.
If you are concerned, don't buy a 3G model. No 3G, no microwave. WiFi uses a different frequency band. If you are concerned about radio frequency emmissions, turn WiFi off. But please don't then ask about why you can't access the internet 🙂
Message was edited by: Ralph Landry1