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Aporte original por: Duane ,

Título:

Unknown error (4000) when restoring iPhone

Texto:

Just had a customer give me a phone which is in boot loop. [br]

Plugged a new screen on, as the glass is broken, along with the home button and camera installed. but still the same.[br]

So tried to restore, but get “unknown error occured (4000)”

whats the cause of this?

Thanks

Dispositivo:

iPhone 7 Plus

Estatus:

open