No internet, no router. Can I stream Netflix to our smart TV using my 4G unlimited data Bluetooth Android phone ?

Solution
You could always use an HDMI cable from your phone if your phone has an HDMI output capability. Not "streaming" to your smart TV but using it as a monitor on your phone.
You could always use an HDMI cable from your phone if your phone has an HDMI output capability. Not "streaming" to your smart TV but using it as a monitor on your phone.
 
Solution
Provide the specific model phone you have. Maybe there are more detailed instructions for that phone. With the info provided I can only answer generically.
 
If your "Smart TV" is really smart, and has its own Netflix application - turn your phone into a hotspot, connect your TV there, play Netflix.
 


That may work. Some cellular plans are not "unlimited" when used as a hotspot or tether.