What is required of the network to allow stitched-sms?

Eg, I know it works with GSM, but why not with ATT-wireless?
This is really a network question.

Below is an example of how it sort-of works with the new GSM network at ATT.

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Okay...this may not answer your question fully, but here goes. I had a 7210 and my other half had an 8265. From her 8265 (which has 10 preset picture messages in the phone) she was able to send me picture messages and they cam through just fine. But when I sent one to her...it went through as 3-4 messages one after the other with a lot of crazy characters, but no picture. So I think that means yes and no?

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http://forums.attwireless.com/attws/...essage.id=1985

Thanks, Jim readynote.com