(the highest number is usually the latest). Choose the Variant based on your region or preference.
Alex hesitated. Then curiosity won.
Assuming you have a bricked Lumia 925 (RM-892) and you found a clean .ffu firmware file: navifirm plus v17 2rar
In most enterprise contexts (including Navifirm deployments), – i.e., a multi‑part archive that must be reassembled before the contained documents become accessible. (the highest number is usually the latest)