Apple has announced that it will launch its new iPhone 4S smartphone in China and 21 additional countries on January 13, ensuring that the handset will become available in over 90 countries since it launched.

The company has said that beginning Friday, January 13 the device will launch 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.

Apple CEO Tim Cook adds that the company has seen huge response to its products in China and that the iPhone 4S launch will be its fastest iPhone rollout ever:

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

Following the opening of pre-orders for the new iPhone 4S on October 7, Apple announced it had sold over 1 million units of its new smartphone in 24 hours, smashing its previous single day pre-order record held by the iPhone 4, shifting 600,000 units. Just days later, the Cupertino-based technology giant said that sales of its new smartphone had exceeded 4 million units over the first weekend (first four days), adding that it saw 25 million people install iOS 5 within the first five days of release.

As a result, Apple had more than 20 million customers using its iCloud service, a platform that launched alongside its iOS 5 software, helping the company to move customer documents and data onto the Internet and reduce dependance on desktop software.