With the iMessage app, you can send messages to other iPhone users over a data or Wi-Fi connection. When using the app to message other iPhone users, you don’t incur text-message charges from your wireless carrier. You also can use iMessage to send free messages to Mac users who have installed the app as well as non-iPhone users; however, you must configure iMessage to send texts to non-iPhone users automatically or manually select the SMS option before sending. Tips Warnings Writer Bio
