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P3 100 What if the signature verification fails when swiping a Samsung card?
1. Due to the risk of brushing, Samsung official website did not provide brushing software, so it is recommended not to brush the machine by itself.
2. If p3 100 mobile phone can't be used normally due to system failure, in order to solve it better, it is recommended to take the purchase invoice, maintenance card and machine to Samsung Service Center, and need the help of engineers.