WEI will request a authentication token that will be provided by a third part software like Play Store in Android to certificate that your request is made by you a human and not by a bot so technically spoof the header agent will not be effective. Dark times awaits us my friend. Other problem is how deep embedded in the system this trust agent that provides these tokens will be. It may be embedded in kernel like Easy Anti Cheat for example and this will make the things even worse because they can classify many devices like " not approved " just by not meet software or hardware requirements