BTW - If you want to see signal strength, etc, remove the battery, hold both up and down volume while re-inserting the battery. the second set of numbers is signal strength. They were happy with 17 and higher. Most of the time I had low to mid 20's when I was getting the beeps and cutting out...

The first set of numbers should be 0, but may occasionally change for a brief period if getting an error from interference... No idea what the rest of the numbers are for, the engineer only cared about the first 2 sets.