Microsoft Miracast is going to be your friend. I don't have home Internet, and use my phone to stream to my TV via Miracast on a regular basis, I've done to for a few years. Works fine with Samsungs built in screen mirroring in Android. Every device I've tried works with it, but I've only used Samsung Android or Windows devices.
The J3 should support it, should have a quick toggle for either screen mirroring or connect(name has changed with android versions).
The Miracast device I have is made by Belkin and looks a lot like a chromecast and plugs into the HDMI in the same way.
Downside to Miracast vs Chromecast is that it mirrors your screen, so what ever you do on the phone is on the TV, this makes it impossible to use the phone for other tasks while casting.
07-22-2018 01:17 AM