This action refreshes the connection of your smartphone to the Wi-Fi network or data network of your carrier allowing messages to be sent and received. This turns off all radio signals on the phone such as it’s Bluetooth, Wi-Fi, and mobile data then turns it back on. The first thing you should do when the Messenger application on your Android device doesn’t send messages is to toggle the Airplane mode. Solution 1: Try to enable then disable Airplane Mode

Here’s what you need to do to fix the Facebook Messenger not sending messages properly issue. If you are one of the users who can send messages properly to your messenger contact list then you will know that this can be a frustrating experience especially if you want to send something important. If only a blue circle can be seen then this means that the message is still sending. You will know that the message has been sent if a blue circle with a check mark appears at the bottom of the message. One of the issues that you might experience when using the Facebook Messenger app is when the messages don’t appear to be sending.

Facebook messenger server status