2021 GX conversion system.
Earlier I updated the OS since I have a few issues with me successfully connecting calls but the other person and I are unable to talk, or hear anything. Both are Samsung Androids which usually work fine, it was only a few times.
While in there I also noticed options to upgrade the MCU, CAN, and AC. I am familiar with an auto CAN system assuming its the vehicle data network and AC probably means air conditioning. What is the MCU upgrade? Do I need to just update evereything available? Is there a listing of upgrades/updates we may need? (or not need)
Thanks for any tips
