Why does the light on Samsung's mobile phone keep flashing?

If the LED light keeps flashing after the phone is turned off, I suggest you:

1. Back up important mobile phone data (such as contacts, pictures, memos, etc. ) and restore the factory settings.

If the problem still exists, please don't use the mobile phone for the time being. It is recommended that you take the purchase invoice, maintenance card and mobile phone to the local Samsung after-sales service center for professional engineers to help you test.