Delivery reports: Checkmark this setting to allow your phone to receive delivery reports for the multimedia messages you send.
Allow delivery reports: Checkmark this setting to send a delivery report when it is requested.
Auto-retrieve: Uncheckmark this setting to download only the heading of multimedia messages, allowing you to manually download the whole message when you’re ready. This is useful for controlling how much data you download.
Roaming auto-retrieve: Checkmark this setting to automatically retrieve messages while roaming.
Priority: Tap to set the default priority for your multimedia messages.