Verykool R16 - Manual (Page 8)

Plug the earphone
Open the USB cover and insert the connector of the earphone to
the earphone jack at the bottom 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 missed call of SIM1
Indicating there is text message not read of SIM1
Indicating there is MMS not read of SIM1
Indicating that the SIM1 is connecting network currently
Divert all voice calls has been set of SIM1
The current alert type is ring only
The current alert type is vib. Only
The current alert type is vib. And ring
The current alert type is vib. Then ring
Indicating that silent mode activated
The mobile phone is locked