No WhatsApp calls on WiFi - real solution.

I had this problem for months, until now. Went trough tons of forums, IPS support etc., all good advice about resetting app, connections - all lots of bull at the end. Left it for while - went into settings on my router again. It came out to be in the access privileges. I say it happened after software update on the router. What needs to be changed is access rights from standard to unrestricted and voilà - WhatsApp calls (video and voice working back again). I still can’t believe I managed to solved it.

The weird thing is - when looking at overview of all devices on Wi-Fi - the were all set to unrestricted. However, when I edited my iPhone and looked at setting in edit mode, it was set to standard. After “apply” and “save”, it works. I thought, I share it if someone needs this.