Why am I getting Amber Alerts?

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Rockstar

I'm sure it will vary by device, but the service is referred to as CMAS for short and each OEM has a different name for the package.  Use a Package Info app to find the proper name for the service and use one of the various ADB commands with ADB Shell to remove or disable it.  If you use the pm uninstall command, the file is still in the back up and will restore with a factory reset, but it just removes the service from being installed actively.