Griffin Technology ClearBoost
This protective case for iPhone includes a built-in booster antenna. The ClearBoost case captures more of the available wireless signals and passes it to the internal iPhone antenna. It gives iPhone users a more dependable signal and fewer service fluctuations, especially common in rural areas, inside buildings and other locations with weak signals. The ClearBoost boosts the built-in antenna of the iPhone and provides durable hard-shell protection, improved connection, wider coverage areas and faster downloads. Available now for $34.99 (MSRP).