U.S. mobile phone carriers recently announced various combinations of exchanging MMS (multimedia) messages. But, looking at the separate announcements was confusing to me. So, I drew a little diagram to help me figure out which services can exchange MMS messages.
The diagram on the left is based on information from the CNET News.com article:
Camera phone photos get wider audience
Note that the MMS exchanges are point to point.
So, you could not, for example, send an MMS message from a Verizon Wireless phone to a T-Mobile phone using Cingular as an intermediary (if I interpreted the news articles correctly).
Are you going to start sending MMS messages to friends on other networks now?
All Or Nothing
Won't help, I expect. Here in the UK, it was only after the networks *all* agreed to exchange MMS messages that it began to take off. I mean; how often do you know what network your friends are on? And since sending an MMS involves a charge, you're not going to do it unless you're sure. The diagram just shows me that US operators still don't get customer convenience :)