Casio G'z One Manual De Usuario

Only one person can speak at a time during Push to 
Talk calls. When using your phone keypad to make a 
Push to Talk call, you must enter the ten-digit phone 
number of the called party. Presence information may 
not be available for all Push to Talk contacts. The 
timeliness of presence information may be impacted 
by the network registration status of a Push to Talk 
contact. Your Push to Talk service cannot be used for 
any applications that tether your phone to computers 
or other devices for any purpose. Push to Talk-
capable phone and service required.