Canon EOS REBEL T7I Wi-Fi (Wireless Communication) Function Instruction Manual page 29

Terminating the Wi-Fi Connection
To terminate the Wi-Fi connection, perform either of the following
operations.
Operating the Camera Using a Smartphone
On the smartphone's Camera
Connect screen, tap on [T].
On the camera's [qWi-Fi on]
screen, select [Disconnect,exit].
If the [qWi-Fi on] screen is not

displayed, press the <k> button.
Select [Disconnect,exit], then select

[OK] on the confirmation dialog to
terminate the Wi-Fi connection.
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