According to a spokesman for WMS, the new pricing structure will launch on May 15 and will provide AT&T customers with three different options for voice, text, and data.
Voice calls will cost $.60 per minute on all RCCL ships while at sea, and will allow passengers to make calls in North American ports at the same rate, regardless of the local cellular pricing.
Depending upon the selected plan, text messages and up to 100 Mbytes of data are also included.
http://www.forbes.com/sites/marcwebertobias/2013/05/10/finally-cheaper-calls-for-cruise-ship-passengers/