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.
如何診斷ALS? https://www.brain-classroom.com/2014/09/%e5%a6%82%e4%bd%95%e8%a8%ba%e6%96%b7als%ef%bc%9f/