How to configure MMS Settings in Samsung Galaxy S4(GT-I9500)?

a). Tap on Messaging as shown below :

b).  Tap on Menu and then tap on Settings as shown below :

c). Settings option will appear. Under Multimedia message (MMS) settings , Tap on Delivery Reports if you want to request a delivery report for each meassage you send.

 d). You can also enable Read reports as shown below if you want to request a read report for each message you send.

e). Enable Auto-Retrieve as shown below to automatically retrieve messages.

f). You can also enable Roaming auto-retrieve option to automatically retrieve messages even while roaming.

g). Now, Tap on Creation mode to select the mode for composing the MMS messages.

h). Tap on MMS alert to get alert when the mode changes to MMS as shown below :