We've all experienced ropey reception at one time or another. Those frustrating moments when you really need to make a call, but the line just won't connect, or you're left trying to decipher broken, distorted responses from the other person. Now, following EE, Three and O2, Vodafone has announced plans to offer WiFi-enabled calls in the UK. Three and O2 have already launched their respective services, but to use them you need to have a dedicated app installed on your smartphone. EE is trialling a service that doesn't rely on any extra software, and today Vodafone says it'll be using a similar approach. So in theory, it'll work quietly in the background with minimal input. Provided you're connected to a WiFi network, calls will switch over automatically when you're out of network coverage.