Turn on predictive text input
You can turn on predictive text input from the Options menu while writing a text message.
Once enabled, predictive text is available to all features that support it.
in the screen’s upper left corner indicates predictive text is active.
ENABLE PREDICTIVE TEXT (QUICK METHOD)
While creating a new text message or calendar note, press and hold the Options key for two
seconds. The message T9 prediction on is displayed and the English language dictionary is
enabled (or the most recently selected dictionary).