I recently bought a Samsung galaxy book 2 360 at best buy and was trying to register that product with Samsung but it keeps telling me my serial number is no good.
Am I not able to register the product with Samsung since I bought it at BestBuy??
If you're using this app to register your product, perhaps try registering it through their website at Samsung.com, or vice versa. Or wait and try again later as their servers may be down for maintenance or have other issues.
Same problem here, i was told by support to ignore the fact my phone never says it's registered on my device, if it's in your account, it's registered. So yeah, do it on the website on a separate, more secure device.