Skype untuk Windows 8

Skype might be the killer app for Windows Phone 8. On the new Windows Phones, Skype will work just like phone calls - you'll be able to call anyone any time, and receive calls just as if they were ordinary phone calls.

The app won't quite be running in the background, Microsoft told me. Since Microsoft owns Skype, Skype calls and messages will send an alert from Microsoft's servers to Windows Phones, waking up Skype on those phones when necessary. That will make Skype more reliable than it is on iOS and Android, where the OSes sometimes shut down the app when they need free memory. It'll also make Skype much more battery-efficient than on Android, where it needs to lurk in the background to capture incoming requests.