Airplane mode, Tty use with sprint service – HTC EVO 4G User Manual

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2B. Settings

Airplane Mode

Airplane Mode allows you to use many of your device’s features, such as Gallery, camera, and Music, when
you are on an airplane or in any other area where making or receiving calls or data is prohibited. When you
set your device to Airplane Mode, it cannot send or receive any calls or access online information.

To quickly turn Airplane Mode on or off:

Press and hold the power button (

), and then tap

Airplane mode

in Phone options.

While in Airplane Mode, the status bar will display

.

To turn Airplane Mode on or off in Settings:

1.

Press

>

and tap

Settings > Wireless & networks

.

2.

Select the

Airplane mode

check box and press

.

While in Airplane Mode, the status bar will display

.

TTY Use With Sprint Service

A TTY (teletypewriter, also known as a TDD or Text Telephone) is a telecommunications device that allows
people who are deaf, hard of hearing, or who have speech or language disabilities, to communicate by
telephone.

Your device is compatible with select TTY devices. Please check with the manufacturer of your TTY device to
ensure that it supports digital wireless transmission. Your device and TTY device will connect using a special
cable that plugs into your device’s headset jack. If this cable was not provided with your TTY device, contact
your TTY device manufacturer to purchase the connector cable.

When establishing your Sprint service, please call Sprint Customer Service using the state
Telecommunications Relay Service (TRS) by first dialing

. Then provide

the state TRS with this number:

866-727-4889

.

To turn TTY Mode on or off:

1.

Press

>

and tap

Settings > Call > TTY mode

.

2.

Tap

TTY Full, TTY HCO,

or

TTY VCO

to turn TTY mode on.

– or –

Tap

TTY Off

to turn TTY mode off.

Note: When enabled, TTY mode may impair the audio quality of non-TTY devices connected to the headset jack.

WARNING:

911 Emergency Calling

Sprint recommends that TTY users make emergency calls by other means, including Telecommunications
Relay Services (TRS), analog cellular, and landline communications. Wireless TTY calls to 911 may be
corrupted when received by public safety answering points (PSAPs), rendering some communications
unintelligible. The problem encountered appears related to TTY equipment or software used by PSAPs. This
matter has been brought to the attention of the FCC, and the wireless industry and the PSAP community are
currently working to resolve this.

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