I was looking to upgrade the wifes 2016 Soul Base (Gas) with the touch screen radio yesterday. I called 2 different dealerships and both parts departments told me that Kia does NOT do upgrades like that. They go off the VIN and will only replace back to Stock (or what ever add-ons the car had from the factory) so they could not sell me an "Upgraded" radio as I wanted. They both apologized and said in a reluctant tone "Just get a cool 3rd-Party one". I asked if that would break my warranty and they said no just dont "splice" wires and the warranty does not cover the new radio.
Hope this helps man =)