SKYPE is the apps she uses to call us. can also see her and her lodging .
Then you should recommend your relatives to get connected to the internet so that they don't have to rush to hang up. Since it doesn't cost anything extra if both sides are using a PC to connect. via skype
In Thailand all the internet shops offer skype connectivity so people can make cheaper international calls from one of these shops. The phone cards are also cheaper there. Only 100baht($4) for a SIM card available at any 7-11 store. I have my Thai SIM card activated for 1 year. It only costs 2 baht to keep the card activated per month i.e. 10 cents.