Thanks everyone. I have Verizon, and a smartphone (iPhone 5, to be specific), so I'll be sure once we leave to either turn the data feature off or turn it off completely.
2007 - Majesty of the Seas (Bahamas)
2009 - Enchantment of the Seas (Western Caribbean)
2010 - Freedom of the Seas (Western Caribbean)
2013 - Golden Princess (Alaska, roundtrip from Seattle)