Canon EOS REBEL T7I Wi-Fi (Wireless Communication) Function Instruction Manual page 22

Establishing a Bluetooth Connection
22
Select [Smartphone].
5
Select [Pairing].
6
Select [Do not display].
7
If Camera Connect is already

installed, select [Do not display] and
press <0>.
If Camera Connect is not installed,

select [Android] or [iOS] on the
screen on the left, scan the displayed
QR code with the smartphone, then
access Google Play or the App Store
and install Camera Connect.

The screen on the left will appear and
pairing will start.