SEOUL, Jan. 18 (Yonhap) -- A group of South Korean iPhone users withdrew a class-action suit against Apple Inc., citing difficulty proving in court that their privacy was violated by the smartphone's user location tracking, a legal representative for the plaintiffs said Friday.

A total of 29 users filed the first-ever suit against the U.S.-based tech company and its local unit Apple Korea Inc. in April 2011, seeking 800,000 won (US$757) per person in damages. They claimed the electronics maker violated the users' privacy by allowing the location-recognition feature on the iPhone to track and store data without their consent.