I see you know everything about this damn cam, great job! So with the ota not working we are screwed for now....maybe one day a hope will comeThere are four Android apps.
1. Chinese - newest version 1.0.4 - still available for download.
2. English - same as Chinese but in English - installing as "70mai dash cam", dash cam pictograph as app icon - it was available for download from the http://www.70mai.com/en/, currently not.
3. New International English - version 1.0.0 - installing as "70mai", "70" as app icon - available in play store
4. New US English - same as 3 but with different servers in configuration xml file
Actually the OTA service for number 2 is not working - "Could not check error in app". When trying to connect manually I've got an error 404 so the update service is currently not available on the server. This version has also some bugs - for example the initial WiFi state configuration is switched. So when we set it to "ON" in the app it will be "OFF".
The difference between US and international version is only a different set of servers that are in the configuration file. Actually the OTA service for US version is not working - there is no OTA service installed on the US server. Not sure if there are no other differences (language maybe) between those two.
The OTA service for the international app is working but is returning always that no update is available.
Currently I think that the English version of the firmware is not available via the OTA service. Only English cams have it and it is some initial or even beta version.
I don't know if there is a way to access camera internal memory via USB.