Huawei Nova 5T User Manual page 80

If you receive a call when the screen is unlocked:
Touch to answer the call.
•
Touch to reject the call.
•
Touch to reject the call and reply with an SMS message.
•
Touch to set a callback reminder.
•
Enable Call Waiting
The Call waiting feature lets you answer incoming calls when a call is already in progress by
placing the first call on hold.
This feature requires the support of your mobile carrier. For details, contact your carrier.
Go to Phone >
click More > Call waiting.
Features may vary depending on your carrier.
Answer a New Incoming Call During a Call
1
When you receive an incoming call when you are already engaged in a previous call,
touch to answer it.
> Settings. Under the SIM card you wish to enable call waiting on,
Apps
76