Post updated April 20th, 2015 at 05:34 pm
The Windows 10 for Phones preview on low end Lumia devices has been pulled from testing after some users reported that the latest build caused their smartphones to brick. The preview is suspended until further notice, and there has been no further statement from Microsoft.
Affected phones are the Lumia 520, 525, and 526; all of which represent the lowest end tier of Windows Phone devices. The devices initially reported an unstable build of the Windows 10 technical preview, and the users had sought to roll back the operating system to Windows 8.1. It was doing the roll back that the devices failed and subsequently bricked themselves. Microsoft does not know what the problem is, but an employee has said that the company is investigating the matter and is working with customers who reported the issue.
Microsoft recently expanded the list of Lumia devices that would be supported by the Windows 10 preview, although it took its time in finalising the number of devices that would be included. This was also done to accommodate the rapid release of new builds for the preview programme, which is part of Microsoft looking to release more updates on a regular basis in the future.
There is always the danger of something going horribly wrong with these sorts of previews, which is why only serious regular users are advised to stay away from them. More often than not the issues faced deal with stability and missing/unactivated features, but the builds can always spring some unwelcome surprises.
[Source: Windows Insider]