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://javidfile.farafile.ir/file/31921/پاورپوینت-روش-های-مقابله-با-حملات-در-شبکه-های-بی-سیم