Samsung Galaxy S4 turns off internet at night On my friends S4 the internet connections (WiFi etc.) turn off automatically from 10pm and turns on again at 6am the following morning, so he gets no messages between those times.

Is there a way we can change it maybe?
Try the profile settings. He probably has set a "night"-profile which turns down the volume and activates the plane-mode. The profile settings can be found in the normal settings of your phone.