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You can select which network modes your phone can use. This setting determines the data speeds you can achieve. Follow these instructions to change network mode.
1. Find "mobile network"
2. Choose network mode
Depending on the current setting, the function is turned on or off.
If you turn on 3G, your phone automatically switches between 3G and GSM provided you're within range of a 3G network.
If you turn off 3G, you can't achieve high data speeds.
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