Trying to play on two different phones

I do.

Make sure you're completely logged off the other device when opening the app. If you get the notification that says you need to update your account info or restore progress just tap your phones back button. It has to be the phones back button not the games. Don't press anything on the screen as you'll only loop the notification.

I don't know why it makes me do it this way but it works going back n forth between my tablet and phone.

Good luck.