It's no longer applicable. Some handsets are able to upgrade to this OS version, but most aren't. If it's not offered as an upgrade to your device, then I would simply wait for Windows 10 Mobile (or get the preview).
It's no longer applicable. Some handsets are able to upgrade to this OS version, but most aren't. If it's not offered as an upgrade to your device, then I would simply wait for Windows 10 Mobile (or get the preview).