Instructions

Call Waiting
You cannot answer the other calls if you don't hang up on the ongoing call. Turn on
"Call Waiting" to get a notification when there is an incoming call.
 Go to "Call" >
"Seetings" > "Carrier Call Settings" > "Additional
Settings" > "Call Waiting".
Multi-Operations During a Call
Adjust the Audio
You can make some adjustments regarding audio during answering a call.
 Adjust the volume: Press the volume button on the left side of the phone.
 Mute: Click the
 Hold: Click
 Speaker: Click
Initiate a Conference Call
Depending on the carrier, you can initiate a conference call with multiple contacts.
 During a call, tap to add calls. Then go back to the current call, dial another
number, and click "Merge Calls".