Tap the message icon.

Tap the required sender.

You have a number of options when you've read the SMS:
Reply to SMS, go to 2a.
Forward SMS, go to 2b.
Delete SMS, go to 2c.

Tap the text input field.

Write your text and tap the send icon.

Tap and hold the required SMS until a pop-up menu is displayed.

Tap forward.
Key in the first letters of the required contact.
Matching contacts are displayed.

Tap the required contact.

Tap the send icon.

Tap and hold the required SMS until a pop-up menu is displayed.

Tap delete.

Tap delete to confirm.

Tap the Home key to return to the home screen.