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://pdf-doc-ir.pdf-doc.ir/file/7434/دانلود-درس-پژوهی-خط-باز-و-بسته-ریاضی-اول-ابتدایی11