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.
http://yoozfile.ir/file/35211/جزوه-کامل-درسی-(پاورپوینت)-طراحی-اجزا-2-برای-مباحث-تسمه-ها-و-زنجیر-ها