Board Thread:Love Live! School Idol Festival Lounge/@comment-26205301-20150314200905/@comment-11148831-20150315042930

Uh.. Yea. After a Google Play/AppStore update, you will still download additional in-game content. Usually, these contents are large.

So.. yep. It looks like either a device problem or an internet problem. Have you made sure that you have enough internal memory space for the large update? Either that, or your internet connection's really slow that it's having a hard time downloading a pretty large content.