The Userdebug build uses a non-certified fingerprint. Fix: Install MicroG (open-source alternative) or use Magisk module "Play Integrity Fix". Do NOT try to relock the bootloader – you will hard brick.
Unlike your smartphone, which runs a locked-down user build, car head units often ship with userdebug because: kswquserdebug os update top
KSWQUserDebug OS Update (title interpreted from "kswquserdebug os update top") appears to combine terms from Android build variants and system update tooling. Below is a concise, structured write-up that explains plausible meanings, typical workflows, and why such a phrase matters. The Userdebug build uses a non-certified fingerprint