Advanced Messaging billing1
Standard MMS and SMS rates apply based on your current AT&T rate plan. If you’re on a plan that includes unlimited texts you won’t be billed any additional charges for Advanced Messaging.
Each text/file attachment is charged as a separate SMS/MMS. If you have limited messages or pay-per-use, you’ll be billed at your current messaging rates. If you send a message with multiple attachments, each attachment as well as your text is counted and billed separately. Example:
if you type a text message and attach a photo and a video, it’s billed as three messages (1 SMS and 2 MMS). Files can be photos, videos, contacts, calendar items or any other attachment.
Screen images are simulated and for demonstrative purposes only.