Have a galaxy s10. With unlimited plus. 30gb/month tethering that I've barely used. Can't use it this morning while in Albany Oregon. Speed test has great speeds on phone, just can't tether. I've tried rebooting phone normal, and In airplane mode.
There might have been an issue with that feature at that time, Shyhosa. Please send us a Private Note, so we can take a closer look into this for you.