Buzz
Currently, there are numerous applications enabling free messaging and calling, among which WhatsApp is widely used. Refer to how to Message, Call Using WhatsApp on Computer, Laptop as instructed by Mytour below.
At present, free chat and call support applications on mobile phones are gradually extending to the Windows operating system, with notable examples being Zalo and Viber. If you wish to use Zalo on a computer, you can refer to the guide on chatting on Zalo on a computer.
In addition to WhatsApp software, using Mocha on a computer, a chat messaging software of Viettel network, is also very convenient. You can also refer to the article on how to use Mocha on a computer shared by Mytour earlier.
