HTC EVO 3D User Manual - Page 62

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. Security Settings Protecting Your Device with a Screen Lock You can increase the security of your device by creating a screen lock. When enabled, you have to draw the correct unlock pattern on the screen, enter the correct PIN, or enter the correct password to unlock the device's control keys, buttons, and touchscreen. To create and enable the screen unlock pattern: 1. Press > and tap Settings > Security >  Set up screen lock. 2. Tap Pattern. 3. Read the information on the screen and tap Next. 4. Study the example pattern on the screen, and then tap Next. 5. Draw the screen unlock pattern by connecting at least four dots in a vertical, horizontal, or diagonal direction. Lift your finger from the screen when finished. 50 2B. Settings