I don’t have one, but what brand/model do you have exactly?
On which side do you think you have the problem? The phone side or the TV side? Can you “see” if the phone “accepts” it? Can the phone “find” the other screen/TV?
I think some people in the forum got something up & running.
If all else fails, there is still Chromecast made of course by Google …
Under 4.4.4 "Settings > Display > Cast screen" looks promising.
Anyway, before buying anything more I think it’s best to ask the support what really works with the phone and what does not. And please publish what they tell you here! Good luck!