Guys

I've got myself a K850i from Europe country and my phone cant read and write chinese
may i know how can i change the phone region and flash with firmware which can support chinese one?

thanks for everyone who guided me
anyway,i've flashed my phone to Hong Kong firmware and i got both simplified and traditional chinese to read and write.
but there is another problem coming in.

When i boot up my phone,then i use it,for less than 1 minute of usage,the screen will go blank but the keypad light one and the vibration still got,and i press the camera key and the camera is working,but i see nothing on the phone,may i know the problem?