LG G3100 User Manual page 134

T9 allows you to input text quickly.
In T9, you only need to press the key with the corresponding
letter once. This is based on a built-in dictionary to which you
can also add new words.
Start writing a word by using the keys 2 to 9.
Press each key only once for one letter.
To write for instance '
7 (For r)
The word changes after each keystroke. Therefore you
shouldn't pay too much attention to how the word appears
on the display until you have pressed all the appropriate
keys.
'.
4 (For G)
159 ( 1 )
5 (For l)
4 (For i)
29