This is regarding WhatsApp VoIP calling failure.
Alright guys, I am experiencing the same issue and went to Multiple Verizon stores where I purchased the new iPhone X and no one could help. I asked to replace the phone and they told me that it wasn’t the phone at fault and contact WhatsApp, after me explaining that the calling voip works with the older iPhone 6s and just doesn’t work with this iPhone X. They were dumb founded.
It is very frustrating when you purchase a high end and very expensive device and the retailers can’t and won’t help you with your issue.
Alright after I have let out my frustrations.. now if you are still reading this.. we finally figured out what fixed this issue for us.
Please let me know if this works for you. Follow the steps below:
1. Close whatsapp app
2. Turn off Hearing Aid Compatibility by following below steps
-Go to Settings -> General -> Accessibility -> Turn Aid Compatibility
Thanks