Galaxy S20 as a hot spot

out of curiosity why not use your current phone as the hot spot instead of using yet another device with an additional line for itself?

I have a plan with them. I just want to know if I can add the phone to my plan and use it as a hot spot? If I can what are the gb limits and speed limits.

There site is vague and people at the store just dont know. I know they will throttle you down eventually and no hot spot is unlimited. 

You would need a phone plan with hot spot ability.