I got this one:

https://smile.amazon.com/gp/product/B074V4N2NS/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1

It fits just fine, but I couldn't get the bubbles out of it- just wouldn't adhere properly in the corners and along sides about 0.25" in from the edge.

https://photos.app.goo.gl/ROkiAM0HkDBe25TH2

Returned it immediately and went looking for another. and found this one:

https://smile.amazon.com/gp/product/B01FSGAQOK/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

It has one semi-negative review over LACK of coverage, which is kinda what I expect with the way the edges of the screen curve, so from my perspective, that looks like it fits so I took the risk. (I'll just return again if its not right).

I've tried 2 for my wifes. The second one is acceptable (https://smile.amazon.com/gp/product/B01FSGAQOK/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1), but not great, the first was total crap and I returned it immediately (https://smile.amazon.com/gp/product/B074V4N2NS/ref=oh_aui_detailpage_o05_s01?ie=UTF8&psc=1). It had bubbles and places it just wouldn't adhere, even when I applied it properly.

Seems to be a common misconception out there that the whole screen on the x4 is completely flat- it is NOT. Its a flat screen, but the edges of the glass are rounded, so obviously, the screen protector can't bend around it, so coverage isn't what most people seem to expect for a "flat" screen. It doesn't have a curved edge like the newer Samsungs etc, but it is definitely rounded. The Omoton could be a little wider (it barely covers the lit part of the screen width-wise), but I think other than that its really fine. You can't get full edge to edge with no gap to your case with the way this screen is made, which seems to be one of the big complaints about many of the screen protectors.