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.
教你更有效地使用iOS 7,Apple推出iOS 7使用手冊電子版! https://qooah.com/2013/09/19/ipad-ipod-touch-ios-7-user-guide/