Just yesterday I wandet to use my mobile (Nexus 5 / Android 5.1 CM 12.1) for connecting to the internet on my notebook (Fedora 22 / KDE Plasma 5). Connecting it via USB and activating USB-Tethering did something in network manager – but did not connect 🙁
Sometimes (eg. doing it for a bulk of geodatasets) converting and transforming geodatasets from their Source-CRS to another with command line tools like ogr2ogr (http://www.gdal.org/ ) can be helpful.
With ogr2ogr it’s also an easy task to use NTv2-based transformations like for Austria the AT_GIS_GRID.