Interesting. So it caches the authorized zipcards offline for this case, right? Why did it fail to unlock 50% of the time? If it failed, could you just retry, o

Interesting. So it caches the authorized zipcards offline for this case, right? Why did it fail to unlock 50% of the time? If it failed, could you just retry, or did it fail 100% of the time in specific bad locations?