Each page on this digital tome will come with its fair share of details as well as tips to help you take apart your Nokia Lumia 820, where among them will include how to replace your display, which is apparently quite a common request, or just to satisfy your curiosity and hopefully, will not result in your smartphone ending up as a brick because of a wayward screwdriver poking around parts that it should not. The leaked service manual also points to schematics and part numbers, basically, just about every single thing required should you need to replace something specific.