Quick answer
What to do first
Use this page as the quick path for the topic. Start with the practical step below, then follow the related pages when you need codes, rankings, or deeper guides.
For mail or jail 7 shifts, start by checking the in-game menu, reward screen, event area, or related system that matches this topic. If the page is about an item, unit, map, code, or update, compare it with the linked guide pages before spending rare resources.