Terrible news. I try to read xNT with my iPhone 7 on iOS 11, but in vain. Besides, I meet other problem. Do u know there is a new image format called HEIC in iOS 11? All my photos have been saved as HEIC format automatically. To view it on my PC, I can only convert it to other format, like JPG, PNG, GIF, TIFF and so on. Oh, what converting tool I applied is Joyoshare HEIC Converter. In fact, it is powerful enough. Considering there is no local support from Windows system, it seems that we can only view it after conversion. If u meet the same trouble, hope it can help u too. Most importantly, are there any other solutions to read xNT?