They gave me conflicting info over whether my 4g LTE phone, a Samsung Galaxy S8+, would still work. About half of the CSRs I've talked to said it should work fine after the 3g shutoff, and the other half say no. After extensive research I think it's going to shut off today.
When they first contacted me, they claimed it was a 3g phone. I haven't had one of those since 2014. It turns out that Samsung upgraded the branded S8 and S8+ phones to properly use VoLTE, which AT&T now requires. But they never upgraded the unlocked phones.
I bought an unlocked phone from Samsung because it offered versatility for travel (pop in a sim in another country) and reduced bloat. Samsung claimed it was 100% compatible with AT&T, and AT&T welcomed it as a BYOD phone. Samsung voluntarily and inexplicably failing to upgrade the unlocked phone when it did so for the branded phones is a slap in the face. I bought a flagship phone for a reason, and this is not the treatment I expect.
Oh, and AT&Tdidn't ask me for a choice -- since that particular CSR said my S8+ was supposed to work after the shutoff. So they sent me a potato phone that is several massive steps down from my 4+ year old S8+.
I was set to buy an S22 Plus or Ultra as my next phone this spring. Now I'm going with a Pixel. It's even the first time I've ever seriously considered going to an iPhone.