I spoke with someone from Technical Support who wasn't aware of what VoLTE was, so i'm not convinced by their answer...
Does anyone know if BT are capable of disabling VoLTE/4G calling remotely per SIM? Unfortunately my phone doesn't have an option to disable VoLTE, and as I live in an area with bad signal, when it swaps between VoLTE and VoWiFi the calls drop. Or is there an account setting somewhere on BT i'm not aware of that will let me disable this?
Currently have to use Airplane mode with WiFi on to get forced VoWiFi which is a bit annoying. Especially when I forget to disable it leaving the house.
Which phone model is it?
On Android you can disable 4g, and retain the 3G level. This should disable volte calling. WiFi calling will be retained. Go to network settings in Android menu.
There are similar options on the iPhone.
That would have been helpful to note! It's the Huawei Mate 20 X.
Unfortunately it doesn't seem to have an option to disable 4G either... Under 'Mobile Data' I have an option to toggle WiFi calling, but not VoLTE. Under preferred network mode "4G/3G/2G auto" is forced and the only option. I did look to see if I could drop 4G.
It's a major pain that the phone opts for 4G calling when it has 1/2 bars signal whereas WiFi is always full.
There must be something strange. Yours is Android 10, and have read instructions. Mine is Android 6 which appears to be the same procedure. (Also On BT Mobile.)
Procedure should be in Settings > Network > More Networks > Tap on Mobile Networks >Tap on Network Mode > Tap on that Network Mode which shows your own setting,. Then you should see a list of modes, e.g, 2g, 3G, 3G/2g auto-connect, etc
Select your preferred 2g/3G auto-connect.
It’s that very last step which is the solution.
For Android 6 you Tap on Network Mode), in this case it’s (for Android 10), Tap on preferred Network Mode, which is shown in bold text, and the listing of network options appears.
That's exactly what I found when searching. Sadly on my phone it isn't quite the case! That's why I was hoping BT could perhaps force 4G/VOLTE off.
Here's what I have.
I'm afraid I might be stuck using Airplane mode with the looks of things.
I too have Android 10 and have a WiFi calling toggle but no 4g calling toggle. I
My phone also chooses 4g overr WiFi calling when the WiFi would appear stronger
Most Android phones have a few engineering/testing menus.
You should be able to force GSM/WCDMA (2G/3G) only by dialling *#*#4636#*#* selecting "Phone Information" and then modifying the "Select preferred network type" option.
Obviously, only try this if you are happy playing around with these settings.