Q: My iPhone App Store is displaying in Chinese and all the costs are in Yen. How do I configure it to show English and US dollars. I went to the International setting on my iPhone and everything is set to USA and English.
A: The most likely cause of this is the iPhone inheriting your App Store settings from your desktop iTunes application. Whenever you sync your iPhone, it will set itself to the account and iTunes Store that you are currently signed into on your desktop.
There are no ways to change the store country or store account on the iPhone itself.
Instead, go to the iTunes Store in your desktop iTunes application, and sign in to the iTunes Store account that you would like to use on your iPhone. Once signed in, simply sync the iPhone to your iTunes library, and the appropriate store settings will be transferred onto the device..