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://medufile.farafile.ir/file/46280/نمونه-سوالات-درس-بررسی-سیستم-های-قدرت-۱-همراه-پاسخ-تشریحی