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.net/document/y6e0r48o-行動電話與汽車事故傷害之研究Astudyofcellularphoneuseandmotorvehicleinjury.html