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.
https://9lib.co/document/8ydkpp6q-多蜂巢多基於訊號干擾雜音比限制之強韌性自動重傳放大後中繼傳送.html