I like that you can send SMS to any number in South Korea or internationally, as well as international calls from within Text for free! It's not so useful when it comes down to actually sending messages via text message; there are several other services which do this much better (KakaoTalk/WhatsApp). You should give them another try if texting isn't your thing - they have some fantastic apps out now too with more functionality than just messaging & calling people using numbers registered under their service. We used these features daily at work while working overseas but were still charged per minute of usage even though we weren’t talking over our mobiles phones themselves – very irritating!! If anyone was going crazy about being billed incorrectly then hopefully all would go away once Text had an update / fix available?