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://hamgam.pdf-doc.ir/file/27132/دانلود-تحقیق-حل-علمي-مسايل-مقدار-اوليه-مرزي-دستگاه-معادلات-جزئي