What is the problem of power backflow when Samsung mobile phone is charging?

2. If the mobile phone is equipped with a third-party plug-in such as a charging doctor, it is recommended to test it after unloading.

3. Back up mobile phone data (phone book, text messages, pictures, etc. ) and restore the phone to the factory settings.

If the problem still exists, it is recommended to bring the purchase certificate of three guarantees and take the mobile phone to the local Samsung service center for testing by professional engineers.