while there are many issues with Wikibase on mobile, it's (imho) decently usable when it comes to looking at labels, aliases and descriptions in "other language": (with changes in https://www.wikidata.org/wiki/MediaWiki:Mobile.css)
on master, the layout does not adjust so nicely to mobile:
part of the issue is that Mobile.css needs to be adapted to changes in css class names and the dom.