Use as a trailer backing up cam on a phone WiFi?

Been there done that, posted about it somewhere here.
Basically IF you can set your phone up as a WiFi Hotspot it works EASY
Set up the hotspot
Put your cam on the hotspot network
enjoy

BUT
If you have a weak WiFi Hotspot it can be a problem.
I’m in Northeast MS. Very poor reception for my phone at times. The first time it took a short while for the camera to connect to Wyze when it read the bar code. The second time, a few days later, it would not connect.

I would recommend a power supply close to the camera, they can be finicky with long USB cords.