For anyone else confused like @aceplace57, 2g technologies began sunsetting roughly 2017-2022, 3g sunsetting was delayed by COVID and other factors, sunsetting largely this year of 2022.
Bandwidth for both are/were being repurposed for additional 4G LTE and 5G technologies as the demand for ever greater internet speeds became the driving factor in the phone market, rather than non VOLTE calling or texting. Most smartphones (flip phones are a different story) sold after around 2014 should be network compatible (not with all carriers however) for years yet, however as mentioned upthread, have almost certainly been out of service on software for years.
But since this is more a tech support thread than a sunsetting thread I’ll leave it at that. I will link two prior threads that touch on this just in case -
The second is the one in which we watched ThelmaLou battle the powers that be to keep her current phone.