As a fellow droid owner I have not run in to this issue. However, my wife has run into a login issue with her iphone. It forgets who she is and wants her to create an account. A reboot of the phone (not a master reset) should correct the issue. I would think since the game is so new that the developer cannot handle all the of the accounts (who would have thought so my any users so fast) and that your device/ account is kind of caught up in the system so to speak. Do you have another device to try and log in from?