I am not sure what u did. U can flash back to original rom by using odin. Try seach the forum for odin and flash back ur rom. There is a guide there. - if u mean hospital is the warranty center i think u just broke ur warranty.
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I am affraid that he can't do that... If you flash firmware of P phone on NON P - you hardbrick phone...
He can't use Odin, because he can't go to download mode.
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