Go to Settings → Security → Enable "Unknown Sources." Go to Developer Options (tap Build Number 7 times) → Enable "USB Debugging" (on the head unit, not your phone).

"Connection Failed," the screen mocked him in broken English.

: Always download APKs from reputable sources. Modifying your car's head unit software is done at your own risk.

Connects your iPhone or Android phone automatically via Bluetooth and Wi-Fi.

Even with the right APK, things go wrong. Here are the top fixes for Android 9 users.