Apple told me my device is Demo unit so Trade In is not available - how come?
I bought my wife iphone 16 pro max device back in South Korea.
(I bought at Korean Carrier store, SKT)
Last month, I bought iphone 17 Pro for her, and send her old iphone 16 pro max for trade in.
Apple rejected and told me it is "demo unit".
Does it mean that the SKT store sold me demo unit? Is there any way I can find out what happened?
And if they sold me Demo unit, what can I do against them? Any suggestion?
iPhone 15 Pro Max