Does updating a Japanese smartphone overwrite pre-installed themes?

[Totchi]

Hi everyone

I've been thinking about buying a Japanese smartphone for quite a while now and I've narrowed it down to the F-03D and the F-08D (not quite sure which one I want more, but I'll get there).

Now, I've been wondering about something and it might sound like a stupid question to you, but I've never used an Android smartphone before. If I had, let's say, the Disney F-08D with all the pre-installed Disney themes and wanted to update from Android 2.35 Gingerbread to a higher OS, would that overwrite them? Or would it just update and keep everything as it is?

Thanks in advance

[ahhdillon]

It really depends on if they decide to include those themes in the next OS upgrade, which they probably would since that is what differentiates the phone.