Lexus 2015 CT200H Owner's Manual page 309

Deleting speed dials
Select "Delete Speed Dial (Del Spd Dial)" using a voice command or the
1
"TUNE•SEL" knob.
Press the preset button to which the desired speed dial is registered, and
2
select "Confirm" using a voice command or the knob.
Limitation of number of digits
■
A phone number that exceeds 24 digits cannot be registered.
CT200h_OM_OM76134U_(U)
309
5-7. Setup menu
5