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://man-ta-ma.farafile.ir/file/34868/جزوه-اصول-تئوری-و-عملی-تست-های-غیر-مخرب-شرکت-ملی-نفت-ایران