These days, calling mobile usually costs the same as calling landlines, but I do remember when calling mobile cost more. But even then, at least the caller gets

These days, calling mobile usually costs the same as calling landlines, but I do remember when calling mobile cost more. But even then, at least the caller gets to decide whether to call or not. And mobile phone numbers look different from landline numbers, so you know what you're calling. The only thing is when the mobile phone is abroad and there are roaming charges; in that case, the callee still pays, because the caller has no way of knowing. But these days, roaming charges have been banned within the EU, so that problem has also disappeared.