'Wi-fi calling' was recently introduced to Virgin Media mobile subscribers, and I believe is available from other networks. Where I live the reception on LTE/3G/2G is pretty unreliable although the phone works quite happily elsewhere. I've switched on the 'Wi-fi Calling' App thinking this was the answer to my prayers. In practice it seems to make no difference. What experiences have other mobile owners had. I get perfectly good broadband (220 Mbps also from Virgin).