... the Nokia 3650 imaging phone has an unusual keypad layout. As a
result, slightly different UI designs may be needed for different phones. For example, using 2 for “Up,” 4
for “Left,” 6 for “Right,” and 8 for “Down” — as many mobile games do — will make the UI unintuitive
when the game is played on a Nokia 3650 phone.
In J2ME implementations, this can be worked around by using MIDP’s high-level “game actions” (Left,
Right, Fire, and so on), which each device will map correctly to appropriate keys, rather than specifying
particular keys in the code.