Also, some BluRay players have the ability to mirror the phone onto the HDTV.
*But... just 3.5mm RCA cables?
That sounds like a HEADPHONE JACK (audio only) so probably not. I don't think phones have analog video outputs at all though maybe some do with a proprietary adapter.
Hmmm: http

/www.tested.com/tech/android/522-androids-headphone-jack-is-versatile-yet-underused/
Not saying this will work, or what program would make it useful if it did but:
"All you need to get the video out is a cable with AV ports on one side, and 3.5 mm jack on the other. "
I'm not sure but I think they mean THIS...