Board Thread:Questions and Answers/@comment-104.7.193.133-20160225045754/@comment-27247829-20160731133540

I'm afraid I don't have an immediate solution; OPPO also came from China or its surroundings, and thus, will not be able to run FGO. You might want to search for the cracked APK which can bypass these securities, but you have to ask someone else and we musn't disclose the request in public.

Try asking others, like  Deyuaru or Sir McDohl. But if you pester them too much, they will not help.