Was that with the default camera? Just tried on mine and while the default camera doesn't work the qr code scanner they tucked away under WiFi settings does (right hand side of the screen on the page with listed WiFi networks).So, apparently the OnePlus phone's camera does not pick up the QR code for joining wifi. Had an alarm technician in the house yesterday and he asked to join the wifi. Thought it was the perfect time for them to try our my custom made "join our guest wifi" picture frame. Had him point his camera to it. Nothing. Very odd. Works like a charm with Samsung and Apple devices.