I have a 2nd gen and a bit later (2012?) Ipad that have been working fine when connects via WiFi to at&t.
However, 2 weeks ago I moved and set up T-Mobile home internet. All my other devices have connected with no issue. A 2013 MacBook Air connected with no issue. The iPads are unable to connect, despite resetting network settings, unplugging modem, etc. The passwords are for sure correct and the devices are able to connect to public networks so not a wholesale WiFi issue on their end. I appreciate any suggestions.