Apple CEO Tim Cook recently said on a conference call that the sales points of his company's popular iPhones have been doubled in China; with the result that Apple's revenue in the world's biggest handset market has witnessed a noteworthy 67 percent increase.

According to the information shared by Cook on the conference call, the number of iPhone sales points in China increased to 17,000 outlets in the period which ended December 29, from 7,000 outlets a year back.

In addition, marking Apple's first ever official disclosure of China statistics in its earnings report, Cook revealed that the additional iPhone outlets in China had given Apple a significant iPhone sales boost - from $4.08 billion a year back to $6.83 billion - in the Greater China region.

Going by the statistics shared by Cook, the iPhone sales in the Greater China region - which includes Hong Kong and Taiwan with the rest of China - witnessed a two-fold increase during the last quarter.

With Greater China being the fastest growing region for Apple, and its third biggest after the Americas and Europe, 13 percent of the company's total sales came from the Greater China region; as compared to 8.8 percent last year.

Noting that Greater China had made a "very significant contribution" to Apple's overall business, Apple's chief financial officer Peter Oppenheimer said on the conference call: "We have established a new operating segment of Greater China."