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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 "Service selection"
2. Select network mode
If you select Automatic, your phone automatically switches between the two network modes provided that you're within range of a 3G network.
If you select WCDMA, your phone can only connect to 3G networks.
If you select GSM/GPRS, you can't achieve high data speeds.
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