How to stop Wifi calling preferences from getting automatically "Optimized" back to "cellular preferred" ?

[madbrain]

I have a Samsung Galaxy Note 22 Ultra. Originally T-Mobile, but it was unlocked and is now on US Mobile Lite speed (using T-Mobile network). This problem is carrier-independent.

I live on a hill, and there is very limited cell signal indoor. The phone often switches between 4G and 5G all on its own even when set stationary on my desk in my home office. If I move around the house, it will sometimes hit cell dead spots, too. Even when the phone has cell signal, data transfer speed (speedtest) is measured in kbps, not mbps. Incoming calls seldom get through when the phone is on cell signal. Texting usually does, but sometimes with a lag of several minutes. Outgoing texts often get stuck and need to be resent. Basically, the cell signal is useless. I have tried other carriers, and they are even worse. Between the terrain on the hills, and the very strong building materials in my mansion, it is akin to a Faraday cage. I tried installing cell booster/repeater before, but it did not help, because the signal outside is too weak, especially during inclement weather. The booster actually made things worse.

Because of this, I have a 6-AP Unifi mesh Wifi system. I set Wifi calling preferences to "Wifi preferred".  Obviously, I don't want cell to ever be the priority. Unfortunately, periodically, the phone shows the message "Wifi calling preferences have been optimized". And it resets the preference to "Cellular preferred". This happens every single day. How can I make the setting stick ?

The only workaround I can think of is to disable mobile data when I am at home, or put the phone in airplane mode, but that is not a great solution, as I may forget to turn it back on when I leave the house.

I found another thread about another user having the same issue on an S21 ultra. He solved it by disabling "switch to mobile data" under intelligent Wifi. Unfortunately, that setting was already off on mine. I just disabled all the other options under intelligent Wifi as well, but I doubt that will have the desired effect of locking the Wifi calling preferences.

[JacksonCampbell]

I remember back in the old Android days when WiFi calling had more definitive settings that stayed where the were set at. I wish they would bring that back.

[madbrain]

Yes, indeed. What's the point of even having a preference setting if it's just going to be ignored ?

Been an Android user since the T-Mobile G1. Although they didn't have Wifi calling back then. And I had a cell signal at my previous residence, also.

[JacksonCampbell]

At least you had WiFi calling. Apple only introduced it years after Samsung phones, much like many other features.

[realaud]

Interesting, I have T-Mobile and have my wi fi calling settings set to cellular preferred, but it always keeps me on wi fi calling when connected to any wi fi network. You can set a routine to put your phone in airplane mode (with wi-fi and BT on) when connected to your home network. This will aitomatically put you in airplane mode, keep Wi-Fi calling as you want it and turn it back to normal when you leave your home, so you don't have to remember to do it.