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.
https://rdarsifile.pdf-doc.ir/file/26420/دانلود-مقاله-سيستم-هزينه-يابي-بر-مبناي-فعاليت