| CPC H04W 4/80 (2018.02) [H04W 8/24 (2013.01); H04W 12/06 (2013.01); H04W 76/14 (2018.02)] | 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:
synchronize one or more signal patterns with a second device;
authenticate based on comparing a particular signal pattern of a signal received from the second device to a stored signal pattern, of the one or more signal patterns, associated with activating a wireless capability,
wherein the stored signal pattern is a time-varying signal pattern; and
activate the wireless capability based on the authentication.
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