Re: QI and unlocked phon
Almost no phone requires unlocking for taking pictures. The assumption is that people want to take the picture now now now before little Johnny stops making that funny face, and unlocking goes in the way.
QR codes (that's what you mean, right?) are not decoded by the standard camera app; you just end up with a picture of a QR code and the phone does nothing with it. You need to use a different app for taking pictures of QR codes and having the phone follow the link.