Microsoft's customer service phone number for the United States is 800-642-7676, as of 2015. The company's customer service number for the U.S. Virgin Islands is 877-678-8033 and 305-418-9143.
Microsoft also provides customer service numbers for other regions in the world, including China, Russia, Switzerland, Norway and Australia. Microsoft's numbers for Canada are 877-568-2495 and 905-568-0434. Its number for China is 400-820-3800 and 800-820-3800. Customer service in the Dominican Republic can be reached at 800-751-3455. In addition, customers can dial 0860-22-55-67 in South Africa and 902-197-198 in Spain. Customers can also reach Microsoft's office in the United Kingdom by dialing 344-800-2400.