Section 2B: Controlling Your Phone’s Settings 57Your Phone’s SettingsWhen establishing your Sprint PCS Service, please call SprintCustomer Service via the state Telecommunications RelayService (TRS) by first dialing . Then providethe state TRS with this number: 866-727-4889.To turn TTY Options on or off:1. Press Menu > Settings > Others > TTY Mode from standbymode. (An informational message is displayed.)2. Press .3. Select TTY Off, TTY + Hear, TTY+ Talk, or TTY Full andpress .Updating Phone SoftwareThe update phone software option allows you to downloadand update the software in your phone automatically. OnlyNote: In TTY Mode, your phone will display the TTY access iconwhen a headset or TTY device is plugged in.If TTY mode is enabled, the audio quality of non-TTYdevices connected to the headset jack may be impaired.WARNING 911 Emergency CallingSprint recommends that TTY users make emergencycalls by other means, including TelecommunicationsRelay Services (TRS), analog cellular, and landlinecommunications. Wireless TTY calls to 911 may becorrupted when received by public safety answeringpoints (PSAPs), rendering some communicationsunintelligible. The problem encountered appearsrelated to TTY equipment or software used by PSAPs.This matter has been brought to the attention of theFCC, and the wireless industry and PSAP communityare currently working to resolve this.