Acer Liquid E - Manual (Page 21)

19 Onscreen call options
Ending a call
To end a call, press .
Using the speakerphone
The speakerphone function allows you to make calls without having to hold
your smartphone. This handsfree function is especially useful for multitasking.
To activate the speakerphone, tap Speaker. Tap Speaker again to disable the
speakerphone.
Muting a call
To mute a call, tap Mute on the voice call screen to switch off the microphone.
Tap Mute again to switch the microphone back on.
Saving a dialed number to contacts
You can save a number you have dialed to your contacts for future use.
1. Select the number from the Call log tab, and tap Add to contacts.
2. Tap Create new contact and select how to complete the action. Please refer
to “Adding a contact“ on page 16.
Conference calls
If you have one call on hold and another online, you can combine both calls to
create a conference call.
After the first call is established, tap Add call to add a second call. Tap Merge
calls to start the conference call.
Tap Manage to split the conference call or end one of the calls.