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ZenFone6 Network GSM - Is the ZF6 a 2G, 3G or 4G phone? (for US phones)

Star II

Please tell us some basic information before asking for help:
Model Name: ZenFone6 : USA (ATT & Tmobile Dual sim)
Firmware Version: stock : android 11
Rooted or not: (not yet)

So every time i make a call on my ATT GSM 4G sim in my supposedly 4G ZenFone6 i get a notice that 3G service will be discontinued in my area.
I stopped by an ATT today to see if it may just be an older sim card and they said it was the phone - and that my ZenFone 6 was or 3G. I said no its a 4G phone and they looked it up and said the system was showing it as a 2G device ?!? So class action lawsuit aside - whats going on with the zenFone 6 ? Is there a way to tell if its 2G, 3G or 4G.... ?
the att folks said the phone was no good - so whats the deal is ATT lying ? Or did asus market the ZF6 as a 4G phone when it was not? I would like to get a 5G dual sim + SD car phone and was looking at ZF7 but not putting any $ down until i get to the bottom of wtf is going on with my ZF6 and or my crappy carrier (ATT).


Hall of Fame III
They guy you were talking to was clearly more of a sales guy than a tech guy. I can guarantee you 100% that you have a 4G phone.
I don't know how far we've gotten with AT&T but there's VoLTE support for T-Mobile on Zenfone 6