The OS update is considered cumulative and, therefore, does not add new features, but instead focuses on fixes and improvements. Microsoft's Gabriel Aul, in fact, noted that theses updates are "very targeted changes to fix specific issues" and "Mostly upgrade fixes and other corner-case things per device model."

After a bit of a misstep on deployment Microsoft was finally able to get Windows 10 Mobile build 10586.63 out to users in the Fast Ring for the Insider program .

However, for those looking for even more detail a Microsoft employee the name of 'jenmsft' on Reddit has posted a small changelog. She posted the following information about today's update:

" Wow, what a busy day... Just wanted to stop in to let you know that, other than the general reliability, battery and perf improvements that come with each of these revisions, there are also a few things that you've reached out to me about that should be improved:" Typing on Polish keyboard in Outlook Mail

Turn by turn directions over Bluetooth in car

Battery usage with Iris Recognition

Reliability of quick actions settings page

MS Band use with Cortana

Users have been able to confirm that the Band – especially Band 1 – is working better with the update. We even noted on Twitter that the Windows Hello login actions also appear to be quicker in addition to the noted improved battery usage.

It will be interesting to see over the next few days what user experiences are from the new build. Gabriel Aul has confirmed that they will "…evaluate this build in the Fast ring for a few days" and if no issues are found they will promote to the Slow Ring for Insiders.

Let us know in comments your thoughts on the .63 update and whether things have improved.

Source: Reddit