TOYOTA 2012 Tacoma - Manual (Page 319)

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3-4. Using the hands-free phone system (for cellular phone)
Changing a registered name
Select “Change Name” by using a voice command or .
Select the name of the cellular phone to be changed by either
of the following methods:
a. Press the talk switch and say the desired phone name, and
select “Confirm” by using a voice command or .
b. Press the talk switch and say “List phones”. While the
desired phone name is being read aloud, press the talk
switch.
c. Select the desired phone name by using .
Press the talk switch or select “Record Name” by using ,
and say a new name.
Select “Confirm” by using a voice command or .