J120i help

Hi,

I bought a J120i in Moscow this summer and I'm still learning how to work with it.
It seems the phone's software has some bugs in it. Does SE acknoledge these somewhere and is there are way to get the software on the phone upgraded?

Also the phone only supports writing in English and Russian, while i also kinda need support for Dutch. According to Sony it's impossible to add this, is this indeed true? I could always train Dutch in of course.

Another problem I have, is that I have no idea how to save the sent messages. I was able to save all my received messages using my SIM, but I can't find an option on how to do that with messages I sent myself. Is there a way to save there?

The final thing I'm interesting in is changing the ringing tone. I tried to add a new tone in several ways, but each time I failed. Is it possible to add new tones and if so, how?