We have BT Infinity 2 and have had no problems until earlier this year. The HH5 would lose the 5ghz wifi connection, 2.4ghz and hardwired connection was ok and restarting the hub would restore 5ghz. The issue became more frequent until it was happening at least twice a week and nothing obvious was causing it, not a disaster but still annoying. We tried all the obvious and BT sent us a Smarthub a month ago, we set it up and put everything on the 2.4ghz apart from downstairs TV and Sky+ box. Everything was fine for the first 2 weeks then the 2.4ghz disconnected, restarting the Smarthub brought it back. It has now disconnected twice, presumably something that was previously connected to 5ghz and now 2.4ghz is disconnecting the wifi but has anyone else had this issue? It went off earlier this evening so we've set up youngest daughters phone to 5ghz only (she got it for Christmas), if next time the 5ghz goes down then that's the device causing it. If not we'll try each thing in turn. I suppose it is possible that the old and new hub are faulty but it seems unlikely. If it is a device why would this happen?