Hi Friend, As per this section of the Wiki Page: You may want to try it out and see if that solves your problem. If not...in the Settings Area under "Wi-fi", switch your N900 lock and you will see "Advanced" options. There is something that allows you to change as to when the wi-fi will "sleep" or "disconnect". One possible reason for your problem may be due to this, because the default setting is for the wi-fi to switch off whenever your screen switches off.