Your first check-in on Dingtone will earn you one star.

If you check in for seven consecutive days and earn 7 ad credits during that period, you will earn another star (for a total of two).

If you check in for another seven consecutive days and earn 14 ad credits during that period, you will earn another star (for a total of three).

If you want to keep the stars you've earned, you need to check in 6 days every week.

Don't worry if you forget to check in and you lose one star. You can get it back by earning 30 credits in one week (from the day the star is lost).