31BasicsTTY Use With PCS Service From SprintA TTY (also known as a TDD or Text Telephone) is atelecommunications device that allows people who aredeaf or hard of hearing, or who have speech or languagedisabilities, to communicate via a telephone.Your phone is compatible with select TTY devices. Pleasecheck with the manufacturer of your TTY device forconnectivity information and to ensure that the TTYdevice supports digital wireless transmission.When establishing your PCS Service, please callPCS Customer Service Solutions SM via the stateTelecommunications Relay Service (TRS) by first dialing. Then provide the state TRSwith this number: 866-727-4889.To turn TTY mode on or off:1. Press .2. Press again to continue.3. Press up or down to select Enable TTY orDisable TTY and press .IMPORTANT NOTICE: Sprint recommends that TTY users makeemergency calls by other means including TelecommunicationsRelay Services (TRS), analog cellular, and landline communications.Wireless TTY calls to 911 may be corrupted when received by publicsafety answering points (PSAPs) rendering some communicationsunintelligible.For additional information and instructions regardingTTY use, please see the Online User’s Guide atwww.sprintpcs.com.