Board Thread:Love Live! School Idol Festival Lounge/@comment-11148831-20151017102958/@comment-11148831-20160425145432

The first block of text says that conducting either of the following could result to losing your current game data:
 * Having your device repaired
 * Performing a factory reset

The second asks for screenshots of the history of purchase for at least 2 items that you paid for (e.g. Loveca Stones, Sets of items [e.g. µ's Final Live Support Set, School Idol Beginner Set], etc.)