■ Push to talk
Push to talk over cellular (PTT) is a two-way radio service
available over a GSM/GPRS cellular network (network
service). Push to talk provides direct voice communication connected
with the push of the volume up key.
You can use push to talk to have a conversation with one person or with
a group of people having compatible devices. When your call is
connected, the person or group you are calling does not have to answer
the phone. The participants should confirm the reception of any
communications where appropriate, as there is no other confirmation
whether the recipients have heard the call.
To check availability and costs, and to subscribe to the service, contact
your network operator or service provider. Roaming services may be
more limited than for normal calls.
Before you can use the push to talk service, you must define the required
push to talk service settings. See Push to talk settings on page 86.
While you are connected to the push to talk service, you can use the
other functions of the phone. The push to talk over cellular service is not
connected to traditional voice communication, and therefore many of
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the services available for traditional voice calls (for example, voice
mailbox) are not available for push to talk over cellular communications.