1. Camera's Wi-Fi is set to [Enable] If [Built-in wireless settings]'s [Wi-Fi/NFC] is set to [Enable] under [ Connecting the Camera to a Computer using a USB Cable (EOS 5D Mark IV).
To connect via Bluetooth, a Bluetooth-equipped camera and a Bluetooth 4.0 or later-equipped device* (supporting Bluetooth low energy technology) is required. *Bluetooth 4.0-equipped devices: above iPhone 4s / iPad 3rd/ iPod touch 5 th Camera Connect for Android