I am based in Australia. I am on the provider "Boost" which is a prepaid MVNO that operates on the Telstra network. I originally bought the Nokia 7 Plus because I thought it supported VoLTE and VoWIFI. To my surprise, the options were never there to turn it on. Researching online drew me to users who had VoLTE on their Nokia 7 Plus on different carriers overseas.
I have waited a year or so, hoping that an update would enable it. I gave up waiting, and decided I'd unlock the bootloader, root the device and enable some settings in the build properties.
I enabled the following settings in the build.prop.
It works perfectly. Voice over LTE works, and Voice over Wifi. I have not tested video calling.
My question is, why, if this device is capable of VoLTE, is it disabled? Surely if the consumer doesn't want it, they can turn it off in settings, but to disable it in the image kind of sucks.
I surely hope someone from Nokia's development sees this and puts a patch in that can enable this feature. In the meantime I have to live with a rooted device without Google Pay