I have a unlimited texting & unlimited calling plan with AT&T (in US) for my Samsung Galaxy Note 3 and I know I'd get charged for texting my friends internationally (text or call an international number), which is dumb as hell. The thing is: I have a friend that lives in Thailand and also another friend that lives in Malaysia (both are International countries) and I was wondering: is it free to text my International friends on Facebook Messenger, WhatsApp or even LINE on my Note 3? Even with 4G LTE? I don't have Internet at my place at the moment (not until Sunday) so I have to rely on 4G LTE to talk to my international or US friends on Facebook Messenger or LINE (or WhatsApp) with 4G LTE for a few days. So I hope, hope, hope I don't get charged for texting my friend through an app on 4G LTE (that would be nonsense!).
Edit: I also only have 15 gigs of data to use through cellular (4G LTE), which is a lot for me, since I don't use much of it (at least until my Internet comes here Sunday).