Do I have to use hotspot on my Android phone to connect to the TV?

Update:

I have been told if my cellular phone has hotspot instead of case I have to use Wi-Fi. I do not want to use Wi-Fi because I do not have a router. How can I hook up my phone to the TV by using hotspot but with no Wi-Fi? Thank you ahead in advance.

Update 2:

I want to use a HDMI cable that has a USB port at the other end to attach to my phone. After I attach the HDMI to the TV I want to watch TV. I was told that if my phone has hotspot I cannot do that. I have to use Wi-Fi which requires a router which I do not have. Thanks again. 

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