The thing with sending MMS is that I believe (if you're with Nextel) that it counts as an SMS. And even with the unlimited plan, you only get 100 SMS messages. The way to get around that is to set up the cell phone that you're trying to send a text to as an email. (For example....firstname.lastname@example.org,
) And I've found that it will go through much quicker than an MMS. Hope this helps.