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How to use the signature authentication of recovering visa-free brush package?
Dear Samsung users:

1, Samsung official website didn't provide relevant information such as mobile phone flash (rom/ baseband).

2. Because of the risk of writing into the system by self-brushing, if there is a problem with the mobile phone system, it is recommended to bring the maintenance card, purchase invoice and mobile phone to the nearest Samsung Electronic Service Center, and the engineer will solve the problem.

3. Self-employment is not recommended to avoid unnecessary losses.