I have a Casio Commando, with Froyo 2.2
Turn off auto-complete:
Menu
Settings
Language & keyboard
X9 Text Input Settings
Language & settings
English (current setting); (there’s a “>” symbol to the right)) press it
Keyboard Input (then another menu pops up)
This is where you’d turn off Auto-correction, Word Completion,
Next Word Prediction, Word Reselection, etc.