I'm unapologetically plagiarizing Adam Carolla here, but I think he made a great point relevant to all travelers who use cell phones. As a (relatively) young guy my cell phone is amongst my my most important travel "tools." Anyhow, Carolla made the following point in his latest book: Cell phones should not work when you only have one or two bars of service. What purpose does it serve for your phone to work well enough to ring and receive a call, but not well enough to have a conversation? He argues that phones should not have bars of reception strength, but an off/on function, the latter being when the phone has a strong enough signal to actually conduct a phone call. I could not agree more.