If you don’t know the person very well, but want a way to keep in contact with them potentially, Snapchat is much less personal(usually). This allows the other person to decide at what level they’re comfortable letting you into their life, especially if you message them via Instagram after you get their snapchat.
When you call a dead phone does it ring?
Answer: A: With a dead battery it should not ring but it should go to voicemail directly.