Nokia N900 User Manual page 101

Send my caller ID — Set your phone number to be
visible to the recipient.
Call waiting — Activate the call waiting service.
Call forwarding — Define the phone number to which
the incoming calls are forwarded if you do not answer.
To forward calls to a specific phone number or to a
contact from your contacts list, select
Select contact.
3 Select Save.
Network settings
Your device can automatically switch between GSM and 3G
networks.
In the status area, the current network is indicated with the
following icons:
GSM
EDGE
3G
HSPA
To modify network settings, select
Phone > Network.
Select the service provider's network
By default, your device selects the network automatically. To
select the network manually, select
Forward to or
Settings and
>
Manual and a network.
Select network mode
Select which network to use. If you select Dual, the device
uses the GSM or 3G network automatically, according to the
network availability, parameters, and the roaming
agreements between network service providers.
For further information, contact your network service
provider.
Define data roaming settings
Roaming is based on specific roaming agreements between
your network service provider and other network service
providers, to enable you to use network services outside your
home network, for example when travelling abroad.
Always ask is selected by default. A connection is only
attempted when a confirmation note is accepted. If you select
Always allow, all packet data connections abroad are
handled as in the home network.
For further information and roaming costs, contact your
network service provider.
Modify SIM card settings
1 Select > Settings.
2 Select Phone SIM card
>
PIN code request — Set the device to request the PIN
code when the device is switched on.
PIN code — Set the PIN code.
Modify settings 101
and from the following: