There are some older posts on this topic but I'm looking for some clarity. Note: I'm using the HTC Settings widget(s) to enable WiFi, GPS, Airplane and Mobile on-demand. I have software v1.56.651.2. Questions 1) When both WiFi and Mobile networks are enabled (and connected) which takes priority? 2) Can I "safely" switch off the Mobile network when WiFi is enabled? (I haven't had any mobile network connectivity issues reported in other threads. Seems to connect back to the mobile network pretty quickly.) 2b) If I switch off the Mobile network while WiFi is enabled, what services am I loosing? 3) What happens when the phone sleeps with Wifi enabled and Mobile disabled? What about when both are enabled?