Latest Skype Preview update brings the option to show Skype on the lockscreen
Microsoft has released a new update to the Skype Preview UWP app, and it's now possible to choose it as one of the apps that can show quick status on the lock screen.
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Skype Preview
Microsoft rolling out Skype Preview for Windows 10 Mobile, updated version for Windows 10 PCs to Windows Insiders
Microsoft is rolling out a Skype Preview app for WIndows 10 Mobile, and adding some new features to the Skype Preview app for Windows 10 PCs.