iMessage activation issue prevents sending and receiving messages

Forgive me if you have already done so but please ensure that you have done the following:

1.) Make sure that you are logged into your account with your Apple ID. The app can’t be used if you are not signed into your Apple ID using the email address associated with your Apple account.

2.) Make sure that your device has active internet. If you are using a cellular device, make sure that your data settings are on for iMessages. On an iPhone or cellular iPAD, go to your settings; locate your data; make sure it’s active; then confirm iMessages has date by opening the data settings and scrolling down to iMessages. Turn on data for that app if needed.

3.) If using a non-cellular device, make sure that your WiFi is active by checking to see if you can get on the internet.