For the time being there appears to be free calling to Iran and no, you will not receive a crazy bill. So long as people don't abuse this "extra" privilege by talking over 15 min for example, this may continue.
It wasn't a "bug" when data usage went up, nor was it "fixed" when the use disappeared. That's how it works. Again you must turn on data to send or receive photos or videos but not necessary just to text someone. Use wifi for most apps and browsing t...
You only need to turn on data in order to send/ receive photos but no data usage will be charged. I keep data turned off otherwise and use wifi to download apps.
