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Brick phones will ring in an unlikely revival
(www.reuters.com)
This is a most excellent place for technology news and articles.
If I remember correctly, GSM900. The shutdown of 2G in my country is set at around 2028 - 2030, so I'd be good for a bit.
In other words, just like with my current phone that doesn't work with VoLTE on my carrier because VoLTE is a total mess. This once again leaves me with 2G for phone calls. (Although I use LTE-only to prioritize data meaning nobody can call me ¯\_(ツ)_/¯)
Hell, my carrier hasn't even yet implemented USSD over IMS which means no call barring settings, no call forwarding settings, no caller ID settings, no USSD codes and just everything else that uses MMI codes. All depends on GSM.
I don't know why it is accepted that there's no single mandatory standard for VoLTE that would work everywhere, but I guess people's ability to put up with BS is just going up over time.
And yes, this impacts emergency services too, with US visitors, for example, even if the devices support VoLTE at home.
In my country, they're planning to phase out 3G, while 2G is very unclear because of just how many things rely on it, not just phones.
Yup, 3G is already dead around here. Well, mostly, O2 is doing the transition very slowly.