Canon EOS 90D DSLR Camera with 18-135mm Lens - Manual (Page 413)

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Connecting to a Smartphone
Sending Images to a Smartphone from the Camera
You can use the camera to send images to a smartphone paired via
Bluetooth (Android devices only) or connected via Wi-Fi.
1 Play back the image.
2 Press the < Q > button.
3 Select [ q Send images to
smartphone].

If you perform this step while connected
via Bluetooth, a message is displayed,
and the connection switches to a Wi-Fi
connection.
4 Select sending options and send
the images.