User manual

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And the charges are also different.)
3. Network Operator
Click network operator, choose SIM card you need to connect, system will search available GSM
and WCDMA network, as Picture 4.4-6
Picture 4.4-6
4.4-5 GPRS data prior mode
After Open GPRS data prior mode, systems will priority chooses your network.
4.5 Sound & notification
4.5-1 Sound
1. Open settings, click Sound, as Picture 4.5-1
Picture 4.5-1