In order to send and receive iMessages to your iPhone, iMessage must be enabled. By doing this, you will associate your phone number with the email address used for your Apple ID or iCloud account.
AT&T is bringing Multimedia Messaging to the iPhone on September 25. But if you can’t wait ten days or so, here’s how to get it now. iPhone 3G or iPhone 3GS. MMS doesn’t work on earlier iPhones iTunes ...