The post you're replying to suggests that an independent LTE connection will be bundled into every device, so that none of the interventions you've listed will work. Good luck maintaining your bubble.
Sorry, but this is the device I will not buy. The tv I have bought was a mistake, it is my last smarttv, next one will be a monitor.
Anyway, why would companies bother to install LTE module, when 99.999% of people will just plug the device to the internet? It would be hugely inefficient. This just wont happen. I have seen chips beeing replaced by another ones due to be 50 cents expensier (and hugely more capable) and the LTE claim would go for even higher costs and logistics (signing the contract with mobile provider in small country like mine? Yeah right.) for trivial number of additional coverage? You are joking, right? My bubble stands as it is. It is your ass on the line, while I will renovate the appartment in next few years and adding tin foil within insulation layer into walls (to kill the wifi disturbancens from neibours) is already planned. 534 euros of additional cost is not that much compared to 60k that it will cost in total.
Actually, "voice over WiFi" is a thing. Seems like it uses the SIM for auth, but transmits the voice data via IP (similar to VoLTE).
I think tin foil in the walls could do the trick, but I'd be wary of potential moisture build up. I'd stay with "just buy stuff that doesn't phone home".
Anyway, why would companies bother to install LTE module, when 99.999% of people will just plug the device to the internet? It would be hugely inefficient. This just wont happen. I have seen chips beeing replaced by another ones due to be 50 cents expensier (and hugely more capable) and the LTE claim would go for even higher costs and logistics (signing the contract with mobile provider in small country like mine? Yeah right.) for trivial number of additional coverage? You are joking, right? My bubble stands as it is. It is your ass on the line, while I will renovate the appartment in next few years and adding tin foil within insulation layer into walls (to kill the wifi disturbancens from neibours) is already planned. 534 euros of additional cost is not that much compared to 60k that it will cost in total.
And dont forget about GDPR.