Microsoft text telephone (TT/TTY) services are available for the deaf or hard-of-hearing. In the U.S., using a TT/TTY modem, dial (425) 635-4948 between 6:00 A.M. and 6:00 P.M. Pacific time, Monday through Friday, excluding holidays. In Canada, using a TT/TTY modem, dial (905) 568-9641 between 8:00 A.M. and 8:00 P.M. Eastern time, Monday through Friday, excluding holidays.
For customer service issues on Microsoft products, upgrades, and services, contact the Microsoft Sales Information Center. In the U.S., call (800) 426-9400. In Canada, call (800) 563-9048.