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Special Dialing Codes

• HCO (Hearing-Carry-Over) — You type text on
your TTY device an d listen to voice rep lies on
your phone speak er.
To change mode w hile not in a call:
1From the main menu, sele ct Settings > Phone
Calls > TTY > Type.
2Select the TTY mode you want.
When you make a TTY call, the call begins in the
TTY mode you last selected.
To change mode during a call using your phone:
1Press m.
2Select In Call Setup > TTY > Type.
3Select the mode you want.
To change mode during a call using your TTY
device, issue one of the following commands:
•“VCO please” — to select VCO mode
•“HCO please” — to select HCO mode
•“HCO off please” — to turn off H CO mode
Important: When you are using HCO, the sound
coming from your phone speaker may
be uncomfortably loud. Use caution
when putting the phone to your ear.
(For information on setting the volume
of your phone speaker, see “Setting the
Volume” on page 135.)

Changing the TTY Baud Rate

By default, your phone’s TTY baud rate is set to
45.45, the baud rate requi red for TTY calls within
the U.S. To make calls ou tside the U.S., set your
TTY baud rate to 50.0.
To change the TTY baud rate:
1From the main menu, sele ct Settings > Phone
Calls > TTY > Baud.
2Select the baud rate for yo ur location.
Special Dialing Codes

Call Restrictions

You can prevent your phone from making or
receiving long distance, incoming, and outgoing
(except 911) ca lls.
Contact BoostTM Customer Care for more
information.

Directory Assistance

Telecommunications Relay Service

BoostTM supports services for com municating with
speech and/or hearing impaired individuals. You
can dial 711 to reach a local Telecommunications
Relay Center. You will then be connected to your