I have a Sagemcom Fast 5688W. I know it can be rebooted from the cell phone app, can you reboot it from a Windows PC Browser web page?
In order to boot from a Windows/ Mac browser you’ll need https access to the 5G gateway - you’ll find another thread on this topic in “Gateways and devices”
Give this a try. Works for me.
Go down to My Games and you will see the T-Mobile app
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