I have a VM LG G4 phone and whilst at home with wi-fi off I have an "H" indicating a 3G network connection. However my wife has a VM Samsung S5 phone and in the same conditions I can not get it to stay with a stable 3G connection. Instead it swithes from "H" to "E" and then stays there. "E" is a 2G network.
How can I fix this? I have gone into network settings and had it scan for networks. I see Virgin and virgin but which to choose? The search facility on this forum shows nothing.