How to turn data services on and off on my BlackBerry Bold 9900 4G

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Switch the network off so that the BlackBerry® Bold 9900 4G will not transmit data without a Wi-Fi connection.
1. Scroll to and select All.
2. Scroll to and select Options.
3. Scroll to and select Networks and Connections.
4. Select Mobile Network.
5. Select Data Services.
6. Select Off to turn data services off.
Note: the small data transfer indicators will change depending on whether data services are active.
7. Select Data Services again to turn data services on.