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You can deactivate data connections. Only text messages and calls are then available. This is useful if you want to avoid unintended data traffic. Follow these instructions to activate or deactivate data connections.
Find "Mobile Network"
Press the Menu key twice.
Press Networks and Connections.
Press Mobile Network.
Activate or deactivate data connections
Press Data Services.
Press On or Off.
Press the Return key to return to standby mode.