(QI HENG)

Customers try latest iPad products at the Apple store in Wangfujing Street in downtown Beijing on January 25, Asia-only "Red Friday."

Apple on April 1 issued a public letter of apology to Chinese consumers over the company's warranty policies in the country.

In the statement, Apple said that the company is making four major adjustments to improve its after-sales services for Chinese consumers, including improving its warranty for iPhone 4 and iPhone 4S, enhancing supervision over and training for authorized service providers.

Apple was told earlier by the China Consumer's Association to equalize local warranty periods with other countries.