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://rayanshahr.farafile.ir/file/33113/پاورپوینت-تحلیل-استیون-هال-و-ترکیب-فضای-عمومی-و-خصوصی