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Microsoft Authenticator
A Microsoft app for iOS and Android devices that enables authentication with two-factor verification, phone sign-in, and code generation.
7,354 questions
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The web is full of 'How-to transfer' Authenticator to a new phone: iPhone to iPhone; Android to Android, but there is no information about manually porting Authenticator data to a phone with a different OS.
As a security device, Microsoft Authenticator does not instill me with confidence.