Network
Network mode—To select which network to use (shown only if supported by the
service provider). If you select Dual mode, the device uses the GSM or UMTS
network automatically, according to the network parameters and the roaming
agreements between the network operators.
Operator selection—To set the phone to search for and select automatically one of
the available networks, select Automatic. To select the desired network manually
from a list of networks, select Manual. If the connection to the manually selected
network is lost, the phone sounds an error tone and asks you to select a network
again. The selected network must have a roaming agreement with your home
network, that is, the operator whose SIM card is in your phone.
Cell info display (network service)—To set the phone to indicate when it is used in
a cellular network based on microcellular network (MCN) technology and to
activate cell info reception, select On.