Getting missed calls from India, Iran or Mexico? As tempted as you might be, don’t call back! Consumer protection organizations are warning about the threat of WhatsApp scam calls being placed from all over the world. The scammers make what’s known as a ping call: They ring briefly and hang up in an effort to get the person to call back, the consumer advice centre in the German state of Rhineland-Palatinate said in a warning to consumers. Calls via WhatsApp are particularly common, but such scams can also be placed via landline numbers. Those affected typically get ping calls from country code…