My phone connects to my home Wifi and although when connected the signal is good, it tends to drop the signal and use my mobile network for data instead which is both slower and potentially very expensive (if I end up exceeding my limit). I have a suspicion that the phone is dropping the Wifi signal to save battery which is fine when it's not in need of data via the Internet but when it is, I want it to check whether it can connect to Wifi first. Does anyone else have this problem? The Wifi, when connected usually has three bars, so that cannot be an issue. When I enter the Wifi settings, it seems to notice and connect to the Wifi network but it should jolly well do that without my intervention!