Make a one-to-one call
Warning: Do not hold the device near your ear when the loudspeaker is in use,
because the volume may be extremely loud.
1. Select Menu > Settings > Connectivity > PTT > Options > Contacts, scroll to
the contact you want to talk to, and press the call key.
2. When the connection has been established, to talk to the other participant,
press and hold the call key while you talk.
3. To end the PTT call, select Disconnect, or if there are several PTT calls, select
Options > Disconnect.