AT&T has confirmed for The Mac Observer that the iPhone MMS support the company rolled out earlier on Friday is compatible with other carriers. That means that an AT&T customer with an iPhone can send and receive MMS messages to and from MMS users on other carriers, or to and from non-iPhone MMS capable devices on AT&T's network.
AT&T rolled out support for MMS, a texting platform that allows for multimedia attachments to text messages to be viewed or played inline with the message itself. Apple added this ability to the iPhone with the introduction of iPhone OS 3.0 at its World Wide Developer's Conference in June, with AT&T implementing what it needed to do to support the feature earlier on Friday.
TMO has received questions from readers about this support, with some reporting that they received incoming MMS messages from users on other carriers the way the iPhone has previously handled such message, as plan SMS text with a link to the MMS graphic that can be viewed through a browser.
An AT&T spokesperson told TMO that MMS between devices on other U.S. carriers is supported -- MMS is a standard. We'd like to hear from users on their continued experiences with users on other networks.