What is your current iDrive I-Step ? Is it id5 or id6 ?
In order to benefit to Carplay fullScreen, you don't need the latest I-step.
Just flash to I-step versions 18-07 or 18-03, so you can still perform FDL coding via USB (.bin files), and at the same time get fullScreen.
If you flash to latest I-Step (newer to 18-11), you will only be able to FDL coding via ENET cable.
In order to benefit to Carplay fullScreen, you don't need the latest I-step.
Just flash to I-step versions 18-07 or 18-03, so you can still perform FDL coding via USB (.bin files), and at the same time get fullScreen.
If you flash to latest I-Step (newer to 18-11), you will only be able to FDL coding via ENET cable.
Password to all uploads is bimmerscene.com