Zxdz 2021 Update -

: Completely "Forget" the head unit's Bluetooth profile from your smartphone's system menu. Reboot your phone, toggle your portable Wi-Fi Hotspot on, and re-pair the phone to the stereo from scratch.

: If your unit won't start after the update, you may need to use the "Test Point" on the motherboard to force it into a recovery state. CanBus Mismatch zxdz 2021 update

Updating an aftermarket car stereo requires strict adherence to technical procedures. Bypassing structural rules can lead to a soft-bricked device that refuses to boot. Step 1: Preparation and Extraction : Completely "Forget" the head unit's Bluetooth profile