If you are using Netflix and want to sign into TV in that case you can easily activate your account on your TV and you can enjoy it while watching movies and series.
First you need to know the Internet is required if you want to sign in to TV.
Switch on the TV and press the home screen button though the TV remote.
Then, search Netflix on Tv. Click on that.
Now the Launch option will appear on your screen, click on that.
After that again go to home screen of your TV and click on Netflix
Now, you need to verify your TV netflix account through the activation code that you can see on your TV screen.
Now, open the browser in your phone and open a Netflix account and type that activation code in your phone.