问题
Recently, I gave an iOS build to my client to test an app. I did it by using Unity and ARKit. From the client's feedback, he downloaded the application but the app is not initializing. In order to let the app to initialize, it requires Internet connection. I used a Plugin in my app when I contacted them, they told me that they are using Google's Firebase in their backend. Is this the reason that the app has been blocked or any other issues? Any suggestion?.
Btw, my client cannot use VPN. Is there a way to run something in code to change to VPN?
来源：https://stackoverflow.com/questions/53664141/how-to-make-mobile-applications-install-and-run-in-chinaany-option-for-the-app