Follow these steps to display a QR code on LabQuest 2:
1. Tap the Wi-Fi icon in the LabQuest toolbar to launch the Connections app.
2. Tap the gear in the upper right corner to display the Network Settings dialog.
3. Connect to the desired network.
4. Tap OK to exit the Network Settings dialog.
5. Tap the gear icon next to Data Sharing to ensure data sharing is set to On and then tap OK.

Note: Before scanning the QR code, make sure your mobile device is connected to the same network as the LabQuest 2.