Issues Connecting Smart TV

Last night all was well. This morning, for some mysterious reason, I cannot connect my Samsung smart TV to my T-mobile internet. My home internet is working fine in my office but my TV is in another room. I have the 5G gateway with the disk room extender (not sure what to call it).  Unplugged everything and turned it back on. Not sure what else to do except call T-Mobile. Thoughts anyone?