I originally had the Uconnect 7 radio in my 2021 Rubicon and upgraded to an 8.4. The 8.4 was new and purchased directly from a dealer, so it was never associated to any VIN. It appears that the radio was manufactured 6/2021 (I know that means it may not have the newest update). The backup lines worked great with the 7, but are absent from the 8.4. Additionally, the 8.4 appears to have a grainy appearance that the 7 did not have. I have tried the reset by holding both the volume and tuner down and that did not work. There also appears to be a black bar across the top to still watch out. Would a update fix it? How would I get the update since the original radio is still probably associated to the VIN. Thoughts, advice? I liked having the lines since none of my previous Jeeps did not have them.