End-to-end encryption and privacy controls.
Message and call for free* around the world.
Group conversations made simple.
Say it with stickers, voice, GIFs and more.
Reach your customers from anywhere.
[iOS 5 Tips] iMessage 是什麼? 一切你需要知道的事! https://qooah.com/2011/10/18/ios-5-tips-imessage/