If it is going to be the only touchless pay system accepted, it needs to work. Every time. It is inconsistent between stores both in whether it works at all and which code you scan. I've had the same sort of problems with different phones and even different Networks. It is consistently inconsistent. The scanner does not necessarily show the price you will have to pay. Even scanning an item in the store it will say it is not available. And so you have to pay some other price.