1. Download DNG file from PixelPeeper

Next, you‘ll need to put the file on your phone/tablet. There are a few ways to do it:
Find the DNG file and import it to Lightroom:
Open the DNG file and create a preset from it:
Save preset by tapping on the check-mark icon in the upper right-hand corner.
You can now delete the DNG file.
Preset is now saved in Lightroom, so you can open your own photos and apply settings:
IMPORTANT NOTE: Keep in mind that the dummy DNG file will always look the same: it's just a hack to transfer presets to Lightroom mobile, until Adobe adds support for XMP file format.
Because of that, you may want to avoid importing multiple presets at once, because it will be hard to differentiate between them.