How can I change the flag of a civilization?

[ffSpartaN 1]

I tried to do it myself but didn't manage to find da wae. I'm on android btw. 

[($Jake$) 460]

Pretty sure modifying the game is practically impossible on android. Unless you wanna dive deep into the folders of the app and experiment with code, there isn't a widely known way of modifying the game for android, explaining the lack of mods for it.