Apple says the iPhone 4S will be available in China and 21 additional countries on Friday, Jan. 13.

“Customer response to our products in China has been off the charts,” says Apple CEO Tim Cook,. “With the launch in China next week, iPhone 4S will be available in over 90 countries making this our fastest iPhone rollout ever.”

Beginning Friday, Jan. 13, the iPhone 4S will be available in Anguilla, Antigua and Barbuda, Bolivia, Botswana, British Virgin Islands, Cameroon, Cayman Islands, Central African Republic, China, Dominica, Dominican Republic, Ecuador, Grenada, Guam, Guinea Conakry, Ivory Coast, Jamaica, Kenya, Madagascar, Mali, Mauritius, Niger, Senegal, St. Vincent and The Grenadines, Trinidad and Tobago, Turks and Caicos and Uganda.