TV is big and bulky and most of the time old, But the phone is cute, slim, curvy, replaceable and portable.
Operational costs for the TV is often acceptable but for the phone, it is often high and demanding.
TV has a remote but the phone does not.
Most importantly, the phone is a two-way communication (talk and listen) but with the TV, you must only listen, whether you want to or not.
Last but not least always remember that TVs are superior because TVs don’t have viruses, but phones often do. And phones can be easily hacked or stolen.