Your printer supports WPS but your TMobile router does not. So the WPS button on your router will not help here
Your printer WIFI security needs to be using the same standard as your router. I would suggest you confirm they are both set to WPA2. Both your printer and router support this. (you could also choose WPA or WEP … but WPA2 is the most secure and the most widely used now … and WEP is considered outdated and insecure)
As others have mentioned, your printer only supports 2.4 ghz wifi.
Since its not certain that your printer wifi is working … you could try a test:
You could create a mobile hotspot on your phone or tablet. Then try to connect your printer to the newly configured mobile hotspot. You should be able to connect. This test, can provide some more info on where the trouble is
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