Can not send Whatsapp message Twilio c#

Question

I am trying to send Wahtsapp message using Twilio but message not arrive yet

This the code in c#:

            string accountSid = "********************************************";
            string authToken = "*************************************";
            TwilioClient.Init(accountSid, authToken);
            var optt = new CreateMessageOptions(new Twilio.Types.PhoneNumber("whatsapp:+79116953214"));
            optt.From = new Twilio.Types.PhoneNumber("whatsapp:+12089527732");
            optt.Body = "Hello guys";

            var msg = MessageResource.Create(optt);

            string sid = msg.Sid;

I bought american number from Twilio and it is active and verified

I can send only to numbers that send message "join me" to active number which is registed on Twilio

Answer 1

It seems like you're missing an important step here.

Having a Twilio phone number is not sufficient to send WhatsApp messages. You first need to have a Meta Business Manager account and then link the Twilio number to it. All the steps are documented here.

Also, don't forget to create a message template if you want to start a conversation with users.