Microsoft has today released a new firmware update for the recently released windows 10 mobile smartphones Lumia 650 and Lumia 550.The availability of this update will depend on your phone model, region or network service provider.

Microsoft official statement:

Hey all, we have started rolling out a new firmware update for Lumia 550/650: 01078.00037.16082.410xx.
Key improvements in this release include:
•Stability and quality improvements.