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://prozheone.farafile.ir/file/23078/تحقیق-در-مورد-مدار-یک-منبع-تغذیه-متغیر-و-تثبیت-شده