I was not able to log-in using the mobile app yesterday.
Since I was in a low-connectivity area, and I keep getting connectivity issues, I did not worry about it much...
However, when one of my online games loaded, and the SM game still gave out connection errors - I thought the server could be down or my connection is too weak to support the game.
Then, when I was in a high connection area, and the game still could not load... I decided to check the app store for updates.
True enough, an update was available, and that was probably the reason why I was having connectivity issues.
Please include a notification when new updates are available so we could update (specially for those with manual update)