An MMS is a message which can contain pictures and other media files and can be sent to other mobile phones. You can send and receive MMS as soon as you've inserted your SIM. If this isn't the case, you can set up your mobile phone for MMS manually.
Tap the indicator next to "MMS Messaging" to turn on the function.
Slide your finger upwards starting from the bottom of the screen to return to the home screen.