Do you remember what the tariff was? which Island trip did you do, do you have any hints on excursions for the Spirit itinerary?
If I remember correctly it was £2.50 per minute.
Not sure how much it was a minute but the signal wasnt very good we were better using our phone inland as you say.
We did an Island cruise last year to the Med. I received and sent several mobile calls while at sea and was surprised at tariff. (pleasantly.
First time i used my mobil in 2003 i phoned from malta when we docked .to my daughter and she phoned me back but it took all my money .as mr briggs says your better to phone on land cheaper.