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://bavarzesh.com/p70-304969-0/اینگهام-برای-تدریس-کتابهای-پیشرفته-به-ایران-آمده-است/