Your TV model simply does not support 802.11n - 5GHz WIFI frequency.

The higher models do support 5G WIFI.

Here's the thing , the bigger brands have been cutting off some features to reduce production cost on lower end models.

Sony was the first one to do it , they have cut off the support for 5GHZ on their entry level & smaller size TVs since last year .
Samsung is the second to follow .

I predict the other brands will also jump on the wagon next year.

Just get a streaming TV box that supports 5GHZ

This post has been edited by Convael: Aug 16 2018, 10:13 PM