I would like to share my experience in obtaining a spare smart key.
I found a vendor on eBay that advertised a brand new smart key. A Mobius OEM smart key came in a sealed OEM package for my Genesis for about a third the price of purchasing one from my state side dealer.
The purchased key, I was very pleased with it since as a bonus the case had sliver
wings on the back and other than that was identical to my original.
Thinking I hit the jackpot I took the new OEM key still sealed in the Mobius package to my Hyundai Service rep for programing. The technician came out to the waiting room and informed me he was able to program the key to start the car if the key was in the slot in the dash, but none of the other functions of the key worked because it did not have the correct radio frequency. He was nice enough to provide with the complete correct Mobius part number for the smart key for my Genesis.
Contacted vendor (In South Korea) and told him of the RF mismatch of the key. He said, yes the RF settings are different for cars in different geological locations. He said he was sorry, but he couldn’t supply a smart key with the correct frequency for the United States, but He would accept the return key and refund my money.
The only catch is Fed-X won’t touch it, UPS said it would be more cost effective to let DHL handle the return. DHL wanted $86.10 to deliver to key to the vendor in Korea because of import taxes and duty fees.
Out of desperation I when to USPS and obtained a reasonable charge to return the key.
Moral, if you order from vendor outside of the US, make sure you know what you are getting and ask you service provider for the correct part number for your car and verify it with your vendor.
Like I always told my kids, "If your dumb, you have to be tuff and the dumber you are the tuffer you have to be"