From the Start screen, swipe left to display the apps list.
Alternatively, tap All apps (located in the lower-right; may require scrolling to the bottom).
Tap new (located at the bottom).
From the "To" field, enter a 10-digit mobile number.
Alternately, enter a contact name. As the name is entered, a matching contact may appear and can be selected at any time.
Alternately, tap the plus symbol (located in the upper-right), tap a contact then select the appropriate mobile number (if applicable).
Repeat this step as necessary to add additional recipients.
From the "type a text message" field, enter a message.
Tap Attach (located at the bottom).
Tap Camera (located at the bottom).
Aim then press and hold the Camera key to take the picture.
Tap Accept (located in the lower-right).
To discard and capture a new picture, tap Retake (located in the lower-right) then repeat step 2.
Tap Send (located in the middle, above the keyboard).