Why Does My Samsung Not Receive IPhone Messages?

You might not be able to get SMS or text messages that someone sends you from an iPhone because they’re still being sent as iMessage.

This can happen if you used iMessage on your iPhone and then transferred your SIM card or phone number to a non-Apple phone (like an Android, Windows, or BlackBerry phone).

Photo in the article by “Wikimedia Commons” https://commons.wikimedia.org/wiki/File:Ipad.jpeg