IPhone 4S still damaged from water?

Ok, so my white iPhone 4S is still water damaged and the camera light was flashing on and off, the screen is still off and black. I placed it in rice in a box and how long shall I keep it in rice for?

Keep the phone in brown rice (not neccesarily white rice is a little less effective) and keep it for 2 days.

Is this a solution. I really impressed

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