Nah. It IS a source of evil. It’s gonna be yeeted over the balcony first thing next chapter and Stalker chan will try to follow it for allowing Yamada to feel such pain again.That phone might not be a source of evil but it surely comes off as a conduit for evil. As far as uses for it, I hope she can tell her boss she quit and maybe claim she eloped. Other than that it seems quite unnecessary.