Please do not take this as an attack. It is not. But if I had someone on my phone plan, who may not know all the ins and outs of a smartphone, and I knew that person was going on a cruise, I would explain to them the importance of either getting an international roaming plan while on the cruise, enabling airplane mode/turning off roaming, and/or just leaving it at home. Explaining to them, failure to do so could result in a huge bill. Also if she wasn't planning on using the phone while on the cruise, excpet for use as a time piece, why take it in the first place? I don't think Verizon should eat the cost just because your mom didn't know about roaming.