ok installed the new OS. doesn't seem like anything have changed, so it's a success

use WOTANSERVER program to re-install your NEO with the latest official ROM. It will debrand it , making it fully basic and english. no need to root

register free account, find the page for xperia neo, then at bottom of the page, download the program

then the program is easy to use, just follow the step by step instructions.

it will display many list, choose "Baltic " something something. it should be the latest version

i don't root, and don't see reason why, for my use
i just do web browsing, online chat, use some productivity apps, use free juice defender, use the camera, and have extra battery.

of course wotanserver is easier, because it's using official rom without rooting

i do like qwerty phones, but when I bought the Neo, the Neo Pro wasn't available, and others are too expensive, lousy battery life, heavy and thick. and xperia mini pro is too small