Unable to use Apple ID for iMessage
For the past >1 year, I have been unable to sign into iMessage using my Apple ID. I am able to send and receive iMessages using my phone number, however when I attempt to use my Apple ID for iMessage I always receive an error message stating "iMessage Activation - An error occurred during activation. Try again."
I have tried many things to
* Turning on/off iMessage and Facetime in various orders.
* Signing out of my device and signing back in.
* Resetting my device.
* Resetting my Apple ID.
* Attempting to sign in from other devices.
* Removing all devices from my Apple account and doing the above steps.
I am at a complete loss on what to do next. It seems completely outside my control.
I'm wondering if anybody else has experienced this issue, and if so how they resolved it?
iPhone X, iOS 12