Canon EOS 750D Instruction Manual page 155

Security
Wireless LAN radio waves can be easily intercepted. For this
reason, we recommend activating encrypted communication in the
access point settings.
Connecting with a Cable
When [51: Wi-Fi/NFC] is set to [Enable], connection via interface
cable, stereo AV cable, or HDMI cable is disabled. Set [51: Wi-Fi/
NFC] to [Disable] before connecting a cable.
When the camera is connected to a computer, printer, GPS
receiver, TV set, or any other device with an interface cable,
settings for [Wi-Fi/NFC] cannot be changed. Disconnect the
interface cable before changing any settings.
Using an Eye-Fi Card
When [51: Wi-Fi/NFC] is set to [Enable], image transfer using an
Eye-Fi card is disabled.
Wireless LAN Notes
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