A clean and stable connection on your Android phone

I need a skilled freelancer who has expertise in all types of Internet proxy VPN connections and all types of servers to identify leaks and fix them. In general, I need a clean connection. In the Windows environment, I have this connection, but I I want to have such a connection inside my Android phone. In the Windows image, a residential proxy is used. In the Android image, the same specification is used by the Windows proxy, but I don't know why it encounters an error.