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You can select which network modes your device 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 GSM/WCDMA (Auto mode), your device automatically switches between the two network modes provided that you're within range of a 3G network.
If you select GSM only, you can't achieve high data speeds.
If you select WCDMA only, your device can only connect to 3G networks.
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