On my phone I had a notification that popped up saying something like "this wifi network is not connected to the internet. Do you want to remain connected?" I had to select yes and "don't ask me again for this network" and then it was fine. If you don't see the pop up, you may have to go into the advanced wifi settings on your phone for that saved network and select an option to remain connected. If you don't, then the phone may automatically disconnect from the F200 Pro's wifi and switch back to your home wifi network.
I also find that I need to start the car, let the camera light turn from red to green (recording in continuous mode), then press the wifi button and let the blue light blink twice or so before trying to connect on the app. I also see that pressing the "disconnect" button inside the app first before closing the app helps avoid needing to power cycle the camera the next time that I want to use the wifi. After disconnecting from inside the app, I close the app and then press the wifi button on the F200 Pro and let the wifi connection drop on its own.
I suspect that most of the wifi problems that people are having are because they close the app without disconnecting first and then drop the wifi connection on the phone without letting the F200 Pro manage it.
