My iPhone has fall down from my hand and when i open it up the camera has not working properly

Something may have broken and is no longer working properly. See the references below nad have it eamined by an Apple Genius Bar or send it in for repair.

iPhone parts and service history - Apple Support

An Unknown Part message appears if the part installation is incomplete or if the part:

Was replaced with a nongenuine part

Was already used or installed in another iPhone

Isn't functioning as expected

For the iPhone Service Answer Center click here --> iPhone Repair & Service - Apple Support

Syed ~ Has the camera ever been repaired or replaced in the past?

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