How to activate iMessage

iMessage is Apple’s own messaging service and is built-in instant messaging (IM) service. You can use iMessage to collaborate with others. iMessage is a free of charge from Apple, secure encrypted messaging service for iPhone, iPad, Mac, and Apple Watch . Unlike standard text messaging, iMessage doesn’t cost anything even when sending messages overseas. It let you send text, picture, video, sound, and location quickly and easily to anyone else using iMessage on iPhone, iPad, Mac, or Apple Watch.