What are the areas that Apple's iphone includes in the old-exchange campaign?

U.S. version/Japanese version of Apple iphone can be used to replace the old in the country?

The U.S. version and Japanese version of the iphone does not support the use of old for the new, Hong Kong version, Taiwan and Macau version of these three non-national line version of the old in the country to replace the new

Hong Kong Version/Taiwan version/Macau version of Apple iphone can be used to replace the old in the country?

Hong Kong, Macao and Taiwan are all three regions in Greater China, and the three-region iphone and the national iphone are available for old-trade in the domestic Apple store.

To replace the new process:

Employees in mainland China's Apple store, after receiving an old iphone, will judge the depreciation of the iphone, providing a different number of Apple store vouchers that can be used to buy iphones or other Apple products

when does the old Apple Exchange start?

Specific time: 2015.3.31, start