What people mean by IMEI blacklist
In common usage, blacklist references relate to operational records around a real device, not to a synthetic identifier generated for testing.
This matters because support, carrier, fraud, and asset systems work from actual device records rather than placeholder values.
Why sample IMEIs should be kept separate
Synthetic test values should never be presented as though they describe the status of a live customer device.
Keeping production data and sample data separate reduces confusion in screenshots, training, demos, and documentation.
Where this helps
This distinction is useful for internal support training, compliance-aware product design, and admin tools that need clear testing boundaries.