Lumia 950 and Lumia 950 XL firmware improves GPS, call quality and stability woes

Update: Microsoft has now confirmed the update and we have added the changelog below

Microsoft may be pushing out a new firmware update for the Lumia 950 (dual SIM) and possibly Lumia 950 XL. A few users on Reddit and in correspondence with us on Twitter have indicated that firmware version 01078.00038.16025.X may be pushed to devices in production (non-Insider status), which is a change from the recent 01078.00027.15506.X that came out at the end of December.

So far, we have not been able to get the firmware update on our unlocked US Lumia 950 XL variant, or AT&T locked Lumia 950. The update appears to be very limited on a regional basis at this time, and Microsoft has not yet commented about the update nor what it fixes.


  • Stability fixes.
  • Improvements for GPS reliability.
  • Improvements for call audio quality.

The only semi-confirmed area is Germany, non-ISP variant, but Microsoft has noted that "the rollouts should continue gradually during the coming days and weeks."

For those on the Insider program, they will need to launch the app and choose Production from the list in order to check for new firmware. No restart is required, and users can return to Insider status at any time.

We'll be looking for any official word from Microsoft on the reported update and will add to this article once received.

Let us know in comments if you are getting an update and, if so, what model and region/country.

Thanks, Bernd, for the tip!

Daniel Rubino

Daniel Rubino is the Editor-in-chief of Windows Central. He is also the head reviewer, podcast co-host, and analyst. He has been covering Microsoft since 2007, when this site was called WMExperts (and later Windows Phone Central). His interests include Windows, laptops, next-gen computing, and watches. He has been reviewing laptops since 2015 and is particularly fond of 2-in-1 convertibles, ARM processors, new form factors, and thin-and-light PCs. Before all this tech stuff, he worked on a Ph.D. in linguistics, watched people sleep (for medical purposes!), and ran the projectors at movie theaters because it was fun.