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://civil.farafile.ir/file/35749/جزوه-برنامه-ریزی-–تعمیرات-و-نگهداری-استاد-علی-حاج-شیر-محمدی