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How to turn off signature verification for Samsung S3 GT-I9300?
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 the 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, which requires the help of engineers.