I'm sorry to say, even after manually separating the LCD segments from the background graphics in MW56, I can't make a good SVG from these photos. There's too much noise and brightness differences.
Tanukichi, I hope it's not too much trouble, but are you willing to open the handheld, remove the fore/background, and try to scan the screen with the handheld still opened? I think that's how JonasP did it.
What i did was remove the bg/fg, replace fg layer with extra polarized film, put bg layer behind reflective layer and reassemble. Otherwise there was too little pressure on the lcd to make good contact.
I played around a bit with white and black levels and gamma for good contrast with as little noise as possible. For some reason scanning inverted seemed to give better results.
The printed films were scanned as transparents on a photo scanner.
Everything at 1200 dpi.