08-08-14, 10:15 AM
I believe it was 3 that were looking in to using your home Internet / WiFi network to transmit the GSM signal required for calls and texts in the absence of a cell signal. Obviously 3G and 4G tech is irrelevant as they are primarily data handling networks and if you are connected to WiFi then you are fine. It's a fairly good stop-gap measure for residents who only have issues at their home / office or other fixed locations.