Windows Phone 8

Windows Phone 8
Version of Microsoft Windows
OS familyWindows NT
Release date2012-10-26
Support end2016-01-12
Based on
Windows 8
Windows Phone 7
Replaced by
Windows Phone 8.1

Windows Phone 8 (codenamed Apollo) is a version of the Windows Phone mobile operating system. This is the first version based on the Windows NT kernel instead of Windows CE, being developed as a version of Windows 8 in concurrency with it.

Windows Phone has its own versioning system. The build of Windows NT that a given build is based on is stated in the build's page.

Update system[edit | edit source]

Windows Phone 8 updates are distributed via Windows Update as CABs with three different extensions:

  • a file of type .spkg is a full package;
  • a file of type .spku is an update package containing PA30 delta compressed files that can be applied on top of a previous build; [a]and
  • a file of type .spkr is a removal package.

List of known builds[edit | edit source]

Developer Preview[edit | edit source]

RTM[edit | edit source]

Post-RTM[edit | edit source]

GDR1[edit | edit source]

GDR2[edit | edit source]

GDR3[edit | edit source]

Uncategorized[edit | edit source]

Notes[edit | edit source]

  1. The delta compressed files can be applied on a Windows PC using a tool like