The question i have for you is how do you plan to solve the curvature of the roof glass when applying the film since unlike regular tint, it isn't shrinkable.
I recently had a weird glitch where once I plugged in charging at EA, my paak stopped working. Had to use a passcode to get in and pw to start car. Thought it was the phone but everything was updated and phone restarted. Pretty sure the car module glitched out somehow. Worked fine after car sat...
Depending on vendor, there's different apps in Wechat. Basically loading wechat app, you would scan their code, which is typically a sticker on the control box. This would link the applet, and make sure to favorite it for easier access.
Ive done mines quite a while back. Used automotive goop for the puck, and blue loctite on screw. been about 7-8 months now with no issues. Dealership jacked the car up from there when i did my rotation recently.