Toyota Tacoma 2012 Owner's Manual page 346

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
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