As I recall, Paul, your bill with Verizon was due to a text photo(s).
With phones being cameras now, the problem such as yours will happen more often.
Re the Blackberry, I do recall seeing the "beards" at Carnival always using the bb, even at sea. The Cellular @ Sea service, believe , is with ATT.
No matter the carrier, I see no reason for anyone to think the cruise line is to blame for their bills.
Not saying Todd thinks this way, just saying, when some complain about their bills after a cruise, they seem to think the cruiseline had something to do with it.