An experiment. Feel free to download and use them for your phones/phablets/etc.
They are both vertical 9:16 aspect ratio images at 1080px X 1920px sizes. There should (hopefully) be sufficient 'white space' in the outer margins to accommodate some stretching or fitting if your device's display doesn't match the fixed size.
If you find these are useful, I may do a series of similarly themed images.
