VoLTE Misconfiguration – woe after the 3G switchoff and maybe evidence of planned obsolecence...

Hi Landak 👋

I had a similar(?) 'palaver' with my SG J4+ 🙄
It had the capability for 'VoLTE' and 'WiFi Calling' and yet whatever I tried I could NOT get the options on the phone to enable these. And then 3G was turned off in my area and my phone just ended up as a 'pretty' brick 😤
I couldn't afford a replacement (this was a 'hand-me-down' from my sister) and so I did many hours of research of the 'tinterweb' as to why this was happening.
After all the research I found out that phones sold by providers are controlled by them, via THEIR firmware/software added to each handset sold, so that updates are not completed (even when manual software update is performed) unless you were using their network e.g. my SG J4+ was sold to my sister by Vodafone and so it needed to be connected to their network to receive software updates to enable the VoLTE and WiFi Calling options.
This is a VERY little known fact and, I'm sure, affects many now that 3G is being turned off.
So, again I did another round of research and found all the details and software needed to be able to 'Flash' my phone to an unbranded software so that updates were received from Samsung rather than Vodafone. 
Hey Presto, I now have a phone that has VoLTE and WiFi Calling capability! Woop Woop!!🎉

When people see a phone is 'unlocked' they automatically think 'SIM' and yet it may still be locked into a provider by its firmware.
I really don't understand why people don't do more research on the internet for 'why' their phone doesn't work when 3G has been turned off as there is plenty of information out there 🤔🙄