Before you set it all up, make sure you have a micro USB charging cable plugged into the MHL adapter. This powers the adapter and charges the phone at the same time.
Next, make sure you have your TV on the correct input before you connect the phone. Then plug the MHL adapter into the phone and wait a few moments. Your Spectrum will need to figure out what's attached so that it can set up a driver.
Once that's done, the TV screen will be mirroring what's on the phone screen. When in portrait, the picture looks pretty average because it's just using the middle third of the screen. In landscape, though, the picture is excellent because it takes up the entire screen.
And since the TV mirrors the phone, your phone screen will be on ALL THE TIME when it's connected.
In my experience, when streaming video through the phone to the TV the battery may actually drain while connected. On the other hand, playing video from on-board storage means the phone will actually charge while being used.
Have fun and experiment, my friend. Glad I could help. :-)
Sent from my LG Spectrum using Tapatalk