4G Dumb Phones

Thank you for mentioning the other list.  I found it:

https://www.att.com/idpassets/images/support/pdf/Devices-Working-on-ATT-Network.pdf

That will keep me busy for a while; it has lots of phones - both smart and dumb.  It even has an old AT&T smartphone (for some definition of "smart"), still available on Amazon, that is less expensive than the Cingular Flip IV.

Att still sells bar and flip phones. 

https://m.att.com/shopmobile/wireless/devices/basicfeaturephones.html/RK=2/RS=SpjPF4xlF4LsIt0oZQaD4K5vHE8-

I just discovered that the Cingular Flip IV - the only dumb phone that AT&T still offers, as far as I know - does not support tethering.  My old Cingular Flip 2 died today and I replaced it with the Cingular Flip IV, assuming I would get everything I had before (and maybe some more).  Instead, I got less.

So now I've got the same question as the OP.  What dumb phones (other than the Cingular Flip IV) work with AT&T?

The link in my previous post leads to 4 basic phones.

It indicates it has tethering... But I can't see where or how... 

https://m.att.com/shopmobile/cellphones/att/cingular-flip-iv.html

That's the Cingular Flip 2.  I had one of those until this morning when I ran over it with my car.  :(   Based on the AT&T web site I found (https://www.att.com/buy/phones/)

it's no longer available.

The link is bad.  Use the one I posted a month ago. 

AT&T doesn't sell the Cingular 2 anymore.  If the 4 doesn't have tethering, then get a different phone.   The Kyocera DuraXE Epic will last a lot longer

The link is bad.  Use the one I posted a month ago. 

Why do you say the link is bad?  It's a link to an official AT&T web site.  It contains (I assume) all the phones available through AT&T including those on the page you linked.

The Kyocera DuraXE Epic will last a lot longer

Good heavens!  At $270 it's edging into the low-end smartphone range.  Why spend that kind of money for a dumbphone?

What about dumbphones not available from AT&T?  What needs to be checked other than being unlocked, accepting the AT&T SIM card, and supporting the bands used by AT&T?

What needs to be checked other than being unlocked, accepting the AT&T SIM card, and supporting the bands used by AT&T?

It would need to be on ATT’s list of supported phones. There are actually two lists, one specifically for unlocked phones. Sorry, I don’t have the link, perhaps someone else will post it or you can google it.

@pokeefe

Just know you get what you pay for, and Amazon ads are often wrong

I eventually decided on a Nokia 6300.  It is on the AT&T list of acceptable phones, had comments on various forums of people using it with AT&T, and supports tethering.  I've already used the tethering support several times:  on my laptop when I had no WiFi or Ethernet access when I was out of town, and tethering my router when my cable internet provider was doing some upgrade work.

The only downside to the Nokia 6300 is that Nokia phones are no longer made by, or are in any way associated with Nokia.  Nokia (the company) sold the Nokia brand.  The brand is now owned by HMD Global.  I could not find anybody except AliExpress that had spare batteries, and the Nokia customer forum seems to be dead.