Zte TELSTRA ROAMER User Manual page 37

HOW TO USE PREDICTIVE TEXT (En mode)
Predictive text allows words to be entered more efficiently using a
single key press for each letter, as opposed to multiple key presses in
abc text mode.
To change from multi-tap to predictive text press # to change your
desired input method to En, this will activate English predictive text
Predictive text uses a built-in dictionary to match possible words.
Handy Hint:
In predictive text mode, when a word is underlined press the # key to
raise the case. Eg. dave > Dave.
You may find that there are multiple valid words that can use the
same key press. If this is the case a dropdown list will appear,
simply use the Arrow Keys to choose from available words to the one
that you want and press OK to confirm
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