Volvo V70R - Manual (Page 226)

225
Phone (option)
Call options
SMS
A single two-tone signal indicates that you
have received an SMS message.
Volume
Raise the volume with the ( + ) button in the
steering wheel keypad. Lower the volume
with the (
– ) button.
When the phone is activated, the steering
wheel keypad only controls the phone
functions.
If you wish to adjust radio settings using
these buttons you must first deactivate the
phone, see page 222.