Can't run a game widescreen/Landscape , its portrait always.

Hello everyone!
I am new to the mobile environment and having some troubles…
I want to build my game widescreen(landscape) or whatever shall I call …
I changed the Aspect ratio in the game inspector to “Andriod wide (3:2)” also wide (16:10) but still the game runs in my device as tall(portrait).
Please some help.
Thanks

go on top menu and follow.
Edit–>Project Settings–> player

then look at inspector click on
Resolution and presentation

change default orientation to landscape left or landscape right