Re: No Service
A simple tactic is to tell everyone you're going to be out of contact, because you'll be spending most of your holiday exploring deep gorges/rain forests/coral reefs/etc with no reception. Many people will believe you because there is a strange belief that outside Britain and the US, mobile coverage is poor, when the situation is exactly the opposite. Then, when at your destination, turn the phone off and lock it securely in a nice steel hotel safe - just to be sure.