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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 "Network mode"
2. Select network mode
If you select WCDMA only, your phone can only connect to 3G networks.
If you select GSM / WCDMA auto, your phone automatically switches between the two network modes provided that you're within range of a 3G network.
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