what is the latest version of Lumia 520 RM-915 AT&T version?

[gameson]

My OS version is 8.10.12393.892

but from MSFT page is 8.10.14219.341

https://forums.windowscentral.com/e...2Flumia520%2Fsoftwareupdate%2F&token=l4L8o-ZC

 

[charlatan1978]

Try running the Windows Device Recovery Tool.
That should tell you.