Go to samsung memebers then click on Diagnostics. Then run it to check all components of phone or just camera modules if its working there and not in camera app then software issue doing factory reset might help if its not working there as well then hardware issue and you need to visit service center for repair if phone is under warranty and no physical or liquid damage to phone they should fix it free of cost if not you need to pay for camera modules which comes as complete set for rear camera which might set you back 8 to 10K atleast might cost more.
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● You can reset your device by following the steps: 1. Kindly create a data backup of your device via the SMART switch mobile application or http://www.samsung.com/in/support/smartswitch pc suite. 2. Remember the Google password before resetting the device because it is required during initial setup. 3. If you do not remember password then advise to reset (Forgot password) your Google account.
Path: Settings> General Management.>Reset>Temporary cloud backup or External storage backup>After backup tap on Factory data reset to reset your device to its factory default settings. This will erase all data, including files and downloaded apps.
If the issue persists, kindly report the problems with a log file. To share a log file, Open Samsung Members Application > Support> Tap on send feedback> Choose Composer> Select error report> select the appropriate issue category> Type your query and send.
