An interesting move by Virgin Media, but you have to be using one of its landlines to get the full benefit of Smart Call.It's an app, but one that works with your landline, taking advantage of the free minutes offered in that 'package' wherever you are in the world. So if you happen to be by the poll in a Greek resort (one with free Wi-Fi), you can make a call home without worrying about it racking up a huge bill, which will no doubt be on the mat when you arrive home.You don't need a Virgin Mobile contract, the app will work on any network. But as we said, you do need the Virgin landline. It is said to work anywhere in the world, with savings also on 0845 and 0870 numbers, plus directory enquiries.For the app, which is available now, you need Android 2.3 and above or an iPhone using iOS 5 or above. Got one of those? Go get it now - if you have a Virgin landline and allowance to take advantage of.