✔ 最佳答案
don't have to buy, return it to apple & let them know what the problem is. they will give you a pair of new (but might have to wait for a week). headphone is also covered under its 1year guarantee
below is the address
Hong Kong
Apple International (Hong Kong) Ltd
2401 RBS Tower
Times Square
Causeway Bay
Web:
http://www.appleclub.com.hk