Posts under category Facebook WhatsApp Business API

I've setup a WhatsApp Business to test WhatsApp API for sending messages. I've followed the getting started guide, but when I send a test message from the main interface of WhatsApp API, the message is sent but is not received by the recipient, even though there is a template approved by Facebook

As shown in the pictures, when I press send message, the sending succeeds but the recipient receives nothing

update : i added a real number ( not using a facebook testing number ) also did not work

I noticed that when I sent a template message to an end user, I got a response as the message was sent, but the user gets a message after 1-2 min. I tried to send 10 messages to a number with high speed Internet and all messages are delayed without any reason. Is anything need to rectified from our side to deliver message without any delay?