A few Insiders received Windows 10 Mobile 10536
Microsoft will officially release a new build next week
Microsoft promised that we would receive a new build of Windows 10 Mobile on Friday this week, but version 10536 was called off in the last minute due to a serious blocking bug found in the code.
The company informed that a newer build would be released early next week, as soon as the bug is fixed and the new build tested.
Yesterday, a few Windows Insiders informed on Twitter that they somehow received this unreleased build (10536). According to one of the Insiders, 10536 was successfully installed on his Nokia Lumia 930 and the new version is more stable and faster than the previous build.
— Michael Boumann (@hxkclan) September 11, 2015
Microsoft also fixed the mobile hotspot issue, the lockscreen delay, the blinking Quiet Hours icon. There is a new option in Settings called zStorage.
Keep in mind that this build 10536 includes a major bug that prevents Insiders from installing builds newer than 10536, so our advice is to unsubscribe from the Windows Insider app and wait for an official release next week.