The samsung Galaxy J5 -J7 will not support mirroring. its isnt enabled at the OS. But, If you use a Chromecast device, It will work. I just did it and it was able to connect to my TV screen. It will also give you the option to Cast your Desktop to the TV (Mirror your smart phone screen).
It can be set also using a Mobile Hotspot, so you can use your phone data plan to connect to the chromecast and be able to use at your Car Screen for example.