You may also look at some of the pre-pay phones that you use phone cards for. You can get a phone for around $20. with some of them and then buy minutes, usually about .25 cents per minute and you get a few free when you activate the phone. You can get them at Walmart or about anywhere now. The pre-pay phones have no long distance or roaming charges. You can't get reception while at sea with them but many of the ports have towers within reach of the port areas.