Forum Discussion
What is the model number of your non-working Roku device? You can either find this in the Roku Settings/System/About, from the box the Roku device came in, or on the device itself. Als0, what is the model number of your new T-Mobile Hotspot device?
Where exactly did you get lost in the instructions above?
For the most part, if you go to https://www.t-mobile.com/support/devices/t-mobile-hotspot, should give you step by instructions for making changes to your T-mobile hotspot.
However, since the RokuTV is working and your other Roku device is not, I am assuming you may have a 2.4ghz-only Roku device. If that is the case, then go into your hotspot's Settings and under the Wi-Fi settings for the 2.4ghz band, verify the 2.4ghz band is still enabled (it is by default) and try changing the mode to b/g/n.
Perhaps this manual will help you https://manuals.plus/t-mobile/wifi-hotspots-manual.