As Microsoft has closed down almost every Nokia related service and sites, it is now very difficult to get software files of Nokia phones. I have provided a collections of working links and mirrors to download Latest and old firmware files for the Nokia lumia 925 RM-892.
Before you proceed any further please check out this blog post i created on installing and downloading of Nokia and Lumia phones Firmwares Here.
Most of the download links are not in English, you can use a browser with automatic translation i recommend google chrome browser.
Downloading and Flashing a Firmware can help you to reset and recover your phone software at anywhere and anytime without a need for an internet connection.This can really help you if your phone is not responding, frozen, experiencing software related or software update problems.
You can also request for more Lumia 925 firmware with product codes by commenting on this post.
Model: Lumia 925 (RM-892),
Product-below code: 059T1R1
Country: Russia (VAR EURO RU CV BLACK)(Multilanguage change in settings)
Software Version: 3051.50009.1424.0004 Cyan
Model:Lumia 925 (RM-892)
Country Ukraine (VAR EURO UA CV BLACK)(Multilanguage change in settings)
Version: 3051.50009.1424.0004 Cyan
Model: Nokia Lumia 925 (RM-892)
Name: VAR EURO RU CV BLACK
Country: Russian (Multilanguage change in settings)
Software Version: 3047.0000.1326.2003
TOTAL SIZE 534.3MB