Telcos are acting like switching off 3G is no big deal, since LTE has been around since 2012, get with the times! VoLTE has only been around since 2016, and even then, was limited to approved models. And only worked if you bought the phone directly from the telco. And only if you had postpaid plan. And only if your account had a “VoLTE enable” flag set by calling them.

To this day, when it doesn’t work phone makers and telcos will point the finger at each other, leaving customers with no clue who to chase for a solution. All parties still act like VoLTE is a nice to have and not a requirement. I really believe the rush to deploy 5G was to have the pretence to shut off 3G and force customers to buy new phones.

I had to root my phone, then use diagnostic serial access to the Qualcomm modem and Russian software to make VoLTE work on my 5G 2020 phone. I fear BYO mobile plans are dead now, buying direct from telcos is the only way they’ll help you be able to make calls on your phone.