I have had a couple issues with my HU, but have been able to fix them quickly and easy. Mostly looking for the latest updates for the firmware/MCU to keep my system up to date. Also looking for info on using a dedicated SIM instead of phone hotspot, and what front/rear cams work best.
@David Hollabaugh
Hello.
In order to learn your current version, please go Settings > About Machine,
then provide the following picture: Build Number; MCU version.

Please connect the SIM card as follow.

And then please go to connect network and check SIM card status to make sure that it can be recognized and use.

If you want to install the aftermarket front and backup cameras, please refer to below link:
https://www.dasaita.com/products/dasaita-backup-front-view-camera-170-super-wide-angle-and-fisheye-correction-1080p-clear-night-vision-rear-view-camera-ip68k-waterproof-universal-reverse-camera-for-car-suv-truck-pickup-camper-van?_pos=1&_sid=08fc689c4&_ss=r
Purchased on Amazon Order # 114-0968437-8939449
Model PX6, Android Version 11
Build #
rk3399-userdebug 11 RQ3A.210705.001 eng.hct2.20250217.162240 release-keys
MCU Version
MTCH_HA4Z_V3.97_1
Dec 1 2022 09:41:47