Internationally calling and texting


    My friend recently travels to the South-East Asia and I am confused about the data rates that may apply. My friend currently has a T-Mobile plan just like me but I am trying to figure out if I can still text them when I am on Cellular data without any charges. Also what if I am using WiFi to text or call him without any charges that may apply. Just trying to figure out if I can text him soon without the both of us having to be billed unexpectedl! Thank you

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