how to downgrade windows 10 preview model into windows 8.1 in lumia 540?

[WPCentral Question]

I have purchased lumia 540 one month ago and on 29-07-2015 i have installed windows 10 preview it is not working properly .i want install windows 8.1 again how tell me the procedure it will not cause any damage to my new phone.

 

[xandros9]

1. If you're worried about potential damage to your phone, you shouldn't have installed 10 on it. One of the things you had to agree to in order to install it is the potential for permanent damage JUST IN CASE the worst happens.

2. How to roll back from Windows 10 Mobile preview to Windows Phone 8.1 | Windows Central