Two cell phone experiences, not particular to your app question. In 2003 I took my Nokia phone, that was all it did, and had 3 or 4 bars on Ranger Bay. That was it. I'm told you can get service on Bayley Bay, at or around the sandy beach landing. A few years ago I took my BlackBerry. Had great reception from Farm Lake up to end of Bald Eagle. Unfortunately I was asked to join a conference. Ever since I've sworn I'd never take it with me again.