# Configure WebAuthn with Device Biometrics for MFA **URL:** \ **Category:** Dev to Dev Hub\ **Tags:** mfa\ **Created:** [May 12, 2026, 1:17am UTC](https://community.auth0.com/t/configure-webauthn-with-device-biometrics-for-mfa/199844 "2026-05-12T01:17:46Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![markkevinpimping](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/markkevinpimping/32/79356_2.png) [@markkevinpimping](https://community.auth0.com/u/markkevinpimping)\ **Post date:** [May 12, 2026, 1:17am UTC](https://community.auth0.com/t/configure-webauthn-with-device-biometrics-for-mfa/199844/1 "2026-05-12T01:17:46Z")
In the official documentation it stated that “Users can only enroll one device per type using WebAuthn with Device Biometrics (one phone, one tablet, one laptop/desktop). If a user wants to enroll another device of the same type, the first device must be unenrolled.” But why am I able to enroll my Android phone and Iphone under the same user account. Please enlighten me how auth0’s device recognition works and how it behaves depending on the device OS. ---
**Author:** ![remus.ivan](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/remus.ivan/32/68771_2.png) [@remus.ivan](https://community.auth0.com/u/remus.ivan)\ **Post date:** [May 29, 2026, 9:00pm UTC](https://community.auth0.com/t/configure-webauthn-with-device-biometrics-for-mfa/199844/2 "2026-05-29T21:00:10Z")
Hi @markkevinpimping, Welcome to the Auth0 Community! To clarify, the documentation’s “one device per type” rule refers to the **operating system (OS) and browser profile** rather than the physical form factor (like a “phone”). Because an Android phone and an iPhone run on completely different operating systems, Auth0’s device recognition detects them as two distinct platform types using the browser’s User-Agent. This is why you can successfully enroll both under the same account. Please let me know if you have any further questions! Best regards, Remus