■ Make and receive a PTT call
Set the phone to use the loudspeaker or earpiece for PTT communication.
Warning: Do not hold the device near your ear when the loudspeaker is in use,
because the volume may be extremely loud.
When connected to the PTT service, you can make or receive dial out calls, group
calls or one-to-one calls. One-to-one calls are calls you make to only one person.