Phone Link is Microsoft’s late and closed source alternative to KDE Connect. It requires you sign in to a Microsoft Account for it to work.

https://support.microsoft.com/en-us/topic/phone-link-requirements-and-setup-cd2a1ee7-75a7-66a6-9d4e-bf22e735f9e3

This means all the transactions between your phone and your PC are monitored and sucked up by Microsoft.

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