Techs & Trends
Samsung galaxy 2 typing problem
Could it be the keyboard / input mode you're using, like Swype or XT9? Most predictive typing systems like that will underline words as you type them just to indicate that the software is actively predicting/correcting your typing, but the underline goes away once you move on the next word.
Rich Brome said:
like Swype
Bingo.
OP - disable Swype and your lines will disappear. I know the feeling, it erked me as well when I first had the phone.