80 
plays when you touch the dialpad keys. Touch the switch 
on the right to turn this feature on or off. 
  Check Vibrate when ringing to enable vibration for 
incoming call notification. 
Set DTMF Tones 
To can set the length of Dual-tone multi-frequency (DTMF) signal 
tones, follow these steps: 
1.  Touch the Home key >    >    > Call settings > DTMF 
tones. 
2.  Touch Normal or Long. 
Use LTE Network for Calls 
Voice over LTE (VoLTE) allows transferring of voice over LTE 
networks and provides faster call connections and better call 
quality. 
1.  Touch the Home key >    > Settings > All settings > 
More. 
2.  Touch the VoLTE voicecall to turn it on or off. 
Use Call Waiting 
Call waiting notifies you of incoming calls when you are in a call. 
1.  Touch the Home key >    >    > Call settings > Carrier 
settings. 
2.  Touch a nano-SIM card and touch Additional settings > Call 
waiting. 
3.  Check Call waiting. 
  NOTE: Contact the service provider to check if call waiting is 
available.