Hello! I've recently purchased a Sony Xperia NTT Docomo X, which is a unfortunately for me, a Japanese model. When I charged her it up and turned it on, I found that the operating system was in japanese. Even after turning the language to English, the operating system is still in japanese in some apps, and is generally inferior to the English version. I'd appreciate some help on how I can install an english version of the firmware onto the phone so I can use the phone. The operating system is the japanese version of 4.0.4 ice cream sandwich, btw!