UPDATE 2/4: Windows 10 Mobile Insider Preview Build 10586.71 is now available to Windows Insiders in the Slow ring.
We have another Cumulative Update for Windows 10 Mobile Insider Preview Build 10586 which we’re releasing today to Windows Insiders in the Fast ring, Build 10586.71. This Cumulative Update contains additional bug fixes outlined below. Windows Insiders in the Fast ring will also notice an Insider Fast Configuration Update that will update an expiring certificate to ensure your device will continue to receive future flights.
We have been working on addressing Windows Insider feedback of the update experience and today many Insiders will get to try out these fixes. Windows Insiders that downloaded the Configuration Update that was published on Friday, or has a device that was automatically updated over the weekend, will experience improvements in the performance and reliability of receiving this Cumulative Update. But don’t worry if you have not yet downloaded the Configuration Update to your device, it will be included in the download with this update.
We have continued to address feedback we receive on Windows 10 Mobile as well as the upgrade experience from Windows Phone 8.1. In some cases, these improvements will only be seen when upgrading from Windows Phone 8.1 such as improvements in cellular and Wi-Fi data profile migration or the availability of SensorCore API’s.
Give this update a try and as always keep sending your feedback!