Sony VPCSB490X Manual

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Using Your VAIO Computer >
Using the International Roaming Service
Using the International Roaming Service
To use the international roaming service, you first need to insert a SIM card into the SIM card holder on your computer. Follow 
the steps in Inserting a SIM Card 
!
You cannot use the international roaming service if you disable the wireless devices or the LAN port in the BIOS setup screen. To enable the devices or 
the port, follow the steps in Disabling Built-in Devices 
Some features and options in this section may not be available on your computer.
See the specifications to find out about the configuration of your computer.