A game designed for a Nokia with a 240x320 screen would display incorrectly on a Samsung with a 240x400 screen—controls would be off-screen, or the graphics would be stretched and distorted. "240x400" was a specific wide-aspect resolution used by popular "resistive touch" feature phones, most notably:
The "TOUCH" keyword in your search signifies the shift from D-pad/keypad controls to on-screen interactions.