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://studentedu.farafile.ir/file/22862/پاورپوینت-(اسلاید)-آنتی-بادی-ها-انواع-و-ساختمان-آنها