KOCASO M776H - Manual (Page 15)

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Picture3.2
3.1-2 Video Call
Click settings in main menu, choose SIM Management, and click video call, choose
defaulted SIM card when makes video call, as Picture 3.3
Picture 3.3
3.1-3 Message
Click settings in main menu, choose SIM Management, click message, choose the
defaulted SIM card when sends message, as Picture 3.4