A device can support 4K output while a specific stream is only available at a lower resolution.
The idea in plain English
A device can support 4K output while a specific stream is only available at a lower resolution.
When it matters
For a UK viewer, HD and 4K streaming affects the decision before choosing a period or device. Compare the stream label, TV input mode and available bandwidth. Record what happened on the real setup rather than relying only on a sales description.
A useful boundary
Treating a marketing 8K name as proof every programme is delivered in 8K. A page can introduce an option, but the current supplier terms and actual device test determine what you receive.
What to do next
Open the relevant brand page and check the original supplier information before ordering. For a technical issue, write down the device, player, connection and one reproducible example. For a price question, ask for the full charge in the currency you will pay.