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You can select which network modes your phone should use. This selection influences the data speeds you can achieve.
1. Find "Preferred network type"
2. Select network mode
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.
If you select WCDMA only, your phone can only connect to 3G networks.
If you select GSM only, you can't achieve high data speeds.
3. Return to the home screen
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