14 DAY TRIAL // Along with the launch of Windows 10 Mobile preview build 10572, Microsoft announced that a new version would be launched next week, which should address some of the bug affecting the current one.
The most important issue is the fact that Windows Insiders will have to go back to Windows Phone 8.1 in order to upgrade to the new Windows 10 Mobile build released by Microsoft.
Aside from that, Microsoft released a list of features that won't work or may not function as intended in build 10572.
If you're not content with some of the things that appear on this list, then you should wait for Windows 10 Mobile preview build 10575, which is supposed to be rolled out next week.
First of all, Microsoft has confirmed the Visual Voicemail sync is broken on same devices. This means that you will have to call your voicemail directly within the Phone / Settings / Chance more settings for Phone / Call Voicemail.
Also, the list of known issues contains a problem with dual SIM devices, which makes unpinning the second line Phone tile from the Start screen to disappear from the All apps list. In order to fix this issue, you will have to reboot the phone.
Furthermore, the Messaging app is not fully functional since opening message threads will crash the application on dual SIM phones if the second line's Messaging tile is removed from the Start screen.
The only workaround for this issue would be to link the second line messaging tile to the first line messaging tile by opening up the first line in the Messaging app, then head over to Settings and link the tiles.
No selected photos for sharing via third-party apps
Another annoying issue would be the fact that you won't be able to select photos to share through apps such as Facebook, Messenger, Instagram and WhatsApp.
Microsoft also warns Windows Insiders that some devices might get into a status where the Phone app will continue to crash upon launch. Simply resetting the smartphone should recover from this crash loop.
Last but not least, it looks like those who updated from Windows Phone 8 to Windows Phone 8.1 might lose the ability to connect to Wi-Fi on Windows 10 Mobile preview builds or may fail to update to future builds.
To recover from this state simply use Windows Device Recovery Tool to update directly to Windows Phone 8.1 and then upgrade to build 10572.