If you want to show 9/16 pictures without mat,  it works well If you have 4k pictures (3240 x 2160 pix). No problem. But if you want to upload a lot of them to make a big slideshow without mat, it's a problem:

- If you upload them through the app, they won't get any mat,  fine. But you have to have them in your phone (not in a pc or a NAS or online) and you can't select all at once in a folder. You have to click/mark each one. Quite long if you have 1000 pictures as I have. 

- if you upload with USB, you get all of them directly BUT they have a mat as standard. You need to go to everyone and change the mat to "no mat". extremly long on the TV, a bit faster through the app but anyway 3 clics per picture. 

What is the solution, if there is one ?