• you have a scheduled furniture delivery to your home, but you forgot. The driver texts you they are nearby. Then again when they arrive. You don’t respond because you forgot and you are not near your phone. Would they not CALL you to please come to the front door and let them into the home?
• emergency call after getting into a car accident, or if trapped in elevator, etc?
• waiting for rideshare pickup in a busy location where there are many vehicles and it’s hard to spot your uber / lyft. Like at an airport or after a concert. The driver may need to CALL to quickly describe where you should meet them.
• Your spouse or parent or child was admitted to the ER at the hospital. Their phone lists you as an emergency contact. You’re suggesting the hospital would use a chat app to contact you?
If your answer is just “wechat”, then that’s fine - but that basically IS the phone app in china (and many other minis apps combined into a super app) lol.