John retired to Portugal. He wants to get a phone that he can use in Spain. WhatsApp is very popular for making long-distance calls in Europe because it's so expensive for mobile. Leo says that in the EU, there is no roaming, but that doesn't apply to regular long-distance rates, which are expensive overseas. Google Voice won't work in Portugal. Leo also suggests TalkaTone, which he can voice-enable the iPad to make calls. WhatsApp is great, but everyone has to be using it, and it won't work with landlines.
Leo says that going to PrepaidwithData.wikia.com will give some idea of how much voice and data is in overseas countries.