talk to the mike from a distance of about 0,5 m for
your voice to be understandable. Use side keys +/- to
adjust volume.
Press this key again to return to the normal mode.
9.7.2 Call Waiting
It is a feature provided by your service provider. If,
while having a phone conversation, somebody tries
to call you, you will be notified about it by a special
beep. In such a case, you can suspend the current
phone call in Options. To enable such service, go to
Settings > Call Settings > Call Waiting.
While having a conversation, there is the Caller’s
number and phone call duration displayed on the
display screen.