Through a text telephone (TT/TDD) service, Microsoft provides people who are deaf or hard-of-hearing with complete access to Microsoft product and customer services.
You can contact Microsoft Sales and Service on a text telephone by dialing (800) 892-5234 between 6:30 a.m. and 5:30 p.m. Pacific time. For technical assistance you can contact Microsoft Product Support Services on a text telephone at (425) 635-4948 between 6:00 A.M. and 6:00 P.M. Pacific time. Microsoft support services are subject to Microsoft prices, terms, and conditions in place at the time the service is used.