So you have trouble with your cell phone signal? The SolidRF TS1 Tri-Band Smartphone Booster can boost your connection. It supports 2G/3G/4G connections. It works on AT&T, Verizon 3G, Spring 3G/4G, Metro PCS, and T-Mobile connections.
By improving your signal, you will be able to talk longer on your smartphone in weak-signal areas.