Problem: On mobile devices it's only possible to add and edit interwikilinks, labels, descriptions and alias. But it's not possible to edit or add statements.
Proposed solution:
Who would benefit: Users, who:
don't have a PC available at any time
prefer to use mobile devices
More comments: This change would make editing Wikidata more accessible, time- and devices-independent. Previously proposed in the 2016 Wishlist Survey.