Right chaps i wanted to know Is there a way to sign in and out so i can play and my friend can play also cause ive bought the game do i need to buy the game again or when my friend signs in he wont have to upgrade ?

The only way right now is to uninstall your game and reinstall. I hope that answers your question.

I you want to use different accounts on 1 phone. You must uncheck the remember me box. This is somewhat inconvenient if you play a lot and want 2 get back into a game quickly after being disconnected. If you already have the box checked then the only way to go back and uncheck it is 2 uninstall then reinstall the app.

thanks both of you yes it helped