Verykool R23 - Manual (Page 13)

the slot at the bottom according to the chat below, then close
the memory card holder.
Plug and unplug the earphone
Open the USB cover and insert the connector of the earphone to
the earphone jack at the right side of the mobile phone. Gently pull
out the earphone to remove it.
Status bar and content
In standby screen you can get the information that you need from
the indication icons on the screen.
Indicating the current signal strength of SIM1
Indicating that the SIM1 is connecting network currently
Indicating there is unread SMS of SIM1
Indicating there is unread MMS of SIM 1
Divert all voice calls has been set of SIM1
Indicating missed call of SIM1
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