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://danesh-pajohesh.farafile.ir/file/31327/پاورپوینت-تعریف-ساختمان-و-مشخصات-فیزیکی-و-هندسی-آن