| CPC H04L 63/0861 (2013.01) [G06F 21/313 (2013.01); G06F 21/32 (2013.01)] | 20 Claims |

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1. A first device, comprising:
one or more memories; and
one or more processors, coupled to the one or more memories, configured to:
obtain, based on a callback request associated with a callback from an entity, biometric information relating to a user associated with the first device;
transmit, to a second device of the entity, callback request information, associated with the callback request, and at least one of:
the biometric information, or
authentication information indicating an authentication of the user based on the biometric information; and
receive, by the first device and from the second device, the callback without further authentication of at least one of the user or the first device.
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