HP Printer Problems

I think they should not have told you that your older printer is too old.  I hope you still have it.

Some devices, such as printers, have trouble connecting to the gateway’s default configuration.

You can have several Wi-Fi networks on the gateway.  You want to leave the default network alone (2.4 & 5 GHz; WPA2/WPA3 and AES security) and add a second, dedicated 2.4 GHz network.  This second network is for devices that can’t connect to the default network.

Add the second network with the + sign at the bottom of the Network tab in the T-Mobile Internet app on your phone.  For this new network, set the band to 2.4 GHz and set the WPA version to WPA/WPA2.   (The encryption will automatically change to “TKIP & AES”)  Try connecting your device to this second network.

Use the default network for your other devices, as much as possible.  Note that WPA/WPA2 (on the second network) is less secure, so I recommend setting this network to be Hidden. You can hide it after you get your devices connected to it.

Here are the T-Mobile support instructions for how to add the second network with the app.

Android  How to create additional Wi-Fi networks | T-Mobile Internet app | Android | T-Mobile Support

iOS  How to create additional Wi-Fi networks | T-Mobile Internet app | iOS | T-Mobile Support

Main instructions

Help Center | APP Android | T-Mobile Support

Help Center | APP iOS | T-Mobile Support

Thanks for responding. I use Apple products for internet/wifi needs. The steps you recommend has been done several ways. I have a second network, we have done changes online several times and several ways, I am able to print before closing the session, however the connection is somehow lost and the blue offline lights starts blinking.