Konka M520 User Manual page 33

3.4.3 Call Hold
If the network supports Call Holding, you can make another call while
you have a call in progress:
Method 1:
Directly enter the phone number or press the Left Soft Key to dial
the phone number you want to call from the phonebook, or press
the Left Soft Key to select New Call, enter the phone number, then
press Pick Up Key
The first call (in progress) will be automatically put on hold.
Method 2:
Press the Left Soft Key to select mute to put the current call on hold.
Then start making another call.
After the call is answered, one call is in progress and the other one is on
hold; and you can switch between the two calls. (refer to "Hold/Switch"
for details)
3.4.4 Mute/Un-mute
With this function, you can turn off/on the microphone of the phone and
any other microphones that are connected to the phone. The "Mute"
function can prevent others from hearing your voice.
During a call, you can press the Left Soft Key to enter "Option→->Mute"
to turn on/off the mute function.
3.4.5 Other Options during a Call
During a call, you can enter the Phone Book, SMS, Sound Recorder
to make a second call.
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