Lydia: This app is cool!
Isabel: Which one?
Lydia: The one you recommended me
Lydia: <file_photo>
Isabel: MobileVOIP
Isabel: I know, it's amazing
Isabel: It has already saved me so much money on calls
Isabel: I have to call Haiti often
Isabel: From a regular phone it would be a fortune
Lydia: I called a hotel in Thailand and it costed me not even a cent...
Isabel: You can also text people
Lydia: Really??
Isabel: The only problem is that you don't see sent messages. 
Lydia: Who needs that. Let me test it! 
Isabel has recommended Lydia an app called MobileVOIP. Lydia and Isabel like the app. It has saved them money on international calls. It is possible to send messages via the app.