Nokia T66520 - Manual (Page 10)

E Copyright Nokia Networks Oy C33902002SE_00 9
Set Regulatory domain according to your location of use. The
Regulatory domain setting affects the available Radio channels. The
radio channels corresponding to the regulatory domains are:
Europe 1...13
Canada 1...11
USA 1...11
Japan 14
Change Transmit power if your wireless network becomes weak on the
edges.