It is known that we can find Apple iPhone selling in many countries out of US, but chinese has cutomized it further with full chinese input support on iPhone.

Compatible with iPhone firmware v1.1.1, the free NativeCN 2.30 third party application provides multiple simplified/tradictional chinese input. The default QWERTY keyboard will also change at the same time, depends on the input selected.

According to the developer, Apple iPhone with firmware v1.1.1 has already built in with a foreign languages input engine, they has successfully unlocked the module and added the chinese input on it. While the software is free for downloads, Hong Kong retailers are now promoting the installation service with a fee.

Source [hksincere]

More info on the NativeCN here [chinese]