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://sida.pdf-doc.ir/file/46265/دانلود-تحقیق-درمورد-معرفي-رشته-مهندسي-پزشكي