How to kill my sim in sims mobile

Elder sims can 'pass away', or die if you will. Dying in the game doesn’t mean you need to face an accident or have an illness. Sim's life has a limited time period. Once the Grim Reaper starts to appear in your home and follow your Elder Sim everywhere, that’s the indication that your Elder Sim is about to pass away.

The good part of dying in The Sims Mobile is the reward that you'll receive. Retired Sim will give you Heirlooms. These will serve as a memento and these will give you advancement in the game too.