NISSAN 2015 GT R - Multi Function Display Owner's Manual - Manual (Page 204)

General rule:
Only single digits 0 (zero) to 9 can be used. (For
example, if speaking 500, “five zero zero” can be
used, but “five hundred” cannot.)
Examples:
1-800-662-6200
“One eight zero zero six six two six two zero
zero”
Improving Recognition of Phone numbers:
Recognition of phone numbers can be improved
by speaking the phone number in 3 groups of
numbers. For example, to call 800-662-6200,
speak “Eight Zero Zero” first, and the system will
then ask to speak the next three digits. Then,
speak “Six Six Two”. After recognition, the
system will then ask to speak the last 4 digits.
Speak, “Six Two Zero Zero”. Using this method
of phone digit entry can improve recognition
performance.
INFO:
For best recognition, speak “zero” for the
number “0” and “oh” for the letter “o”.
Voice recognition 8-5