Canon EOS Rebel SL3 DSLR Camera with 18-55mm Lens (Black) - Manual (Page 472)

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Operations such as shooting and playback are not possible.
z With a Wi-Fi connection established, operations such as shooting and
playback may not be possible. Terminate the Wi-Fi connection, then
perform the operation.
Cannot reconnect to a smartphone.
z Even with a combination of the same camera and smartphone, if you
have changed the settings or selected a different setting, reconnection
may not be established even after selecting the same SSID. In this
case, delete the camera connection settings from the Wi-Fi settings on
the smartphone and set up a connection again.
z A connection may not be established if Camera Connect is running
when you reconfigure connection settings. In this case, quit Camera
Connect for a moment and then restart it.
Operation Problems
A camera button or dial does not work as expected.
z Under [ 5 : Custom Functions(C.Fn)] , check the [Assign SET button]
setting ( = 452).
z For movie shooting, check the [ 5 : Shutter btn function for movies]
setting ( = 254).
During touch screen operations, the beeper suddenly sounds
softer.
z Check if your finger is blocking the speaker ( = 28).
Touch operation is not possible.
z Check if [ 5 : Touch control] is set to [Standard] or [Sensitive]
( = 65).