Tap the message icon.

Tap the required sender.

Tap the required MMS to read it.

Tap the return icon.

You have a number of options when you've read the MMS.
Reply to MMS, go to 3a.
Forward MMS, go to 3b.
Delete MMS, go to 3c.

Tap Write message.
Write the text for your reply.

Tap Send.

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

Tap Forward message.

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

Tap the required contact.
Repeat the procedure to add more recipients.

Tap Send.

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

Tap Delete message.

Tap Delete.

Tap the home icon to return to the home screen.