If you have text input keyboards downloaded from the web, you can change the keypad type. Tap and hold the text input field and select Input method → a keypad type.
››Enter text using the QWERTY keyboard
When you slide open the device, you can use the QWERTY keyboard. Select the keys as necessary to enter your text.
Use the following features with the QWERTY keyboard:
•Press [] to change case.
•Press [] to enter characters on the upper half of the keys.
•Press [] to bring up a character picker for miscellaneous symbols.
•Press an appropriate key to enter a character, number, and symbol.