iMessage does not send SMS or MMS. SMS messaging is a feature of the mobile network, and they're sent directly from the device to the carrier SMSC without goin

iMessage does not send SMS or MMS. SMS messaging is a feature of the mobile network, and they're sent directly from the device to the carrier SMSC without going through Apple's servers. You might be confusing iMessage with Messages. The former is a messaging platform, the latter is an app that can send messages either via iMessage or SMS (assuming a mobile device, or pairing with an iPhone).