How can messages be sent and received in the WhatsApp application without traffic and money on the account?

Question

Mobile development

The fact is that there is an idea with the transfer of money, I would like to know whether it is possible to make transfers without
traffic and money in the account, as the WhatsApp application does with messages.

Answer 1

Well, look: in order to send something, in this case this is a message, you must send this "something" this something is traffic (data packets), so you won't be able to do it without traffic.

Answer 2

WhatsApp cannot send messages if there is no traffic leaving the phone.

Answer 3

And how does it transmit this traffic without money for the account and connection to the Internet?

Answer 4

maybe your Whatsapp used wifi when there was no money in the account?