Calm down guys, I know it's not a new fandangled whizzo gizmo, I have Skype and Facetime too, but not everyone I know does, hell, some of them even still buy newspapers. Anyways, after a recent WhatsApp update it mentioned that this 'Calling' was a new facility in the App, and I thought it would be ideal to use it to make standard phone calls esp overseas, thus avoiding roaming charges. My question is about the charges and how much data allowance a call is likely to use up, guess I'll have to ask my provider, or failing that just get an unlimited data usage SIM...