Samsung - Galaxy S9 (SM-G960U)
|Method:||Available Over the Air + OEM Tool|
March to May 2018 Security updates and other bug fixes.
How long does it take for my phone to get this update. Just checked and its says up to date but I have yet to get the update. I am still on Security patch February 2018
No, wifi enablement is something different. Usually you see that when someone had WIFI calling on a phone and switched devices like an exchange or new phone. When you try to activate, the server is like, "Why are you trying to activate, you already are active".
Did you previously have Wifi Calling?
I've had it active on the s9+ before and had the pixel 2 before this.....
Maybe call and have them remove the five and try adding adding calling plus again?