My back camera only works on Instagram

What happens when you take a picture or make a video with your back camera? Do you see any error notifications?

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Meanwhile, Try and Force Restart your iPhone EXACTLY as shown below and see whether that resolves the issue:

• Press and quickly release Volume UP button
• Press and quickly release Volume DOWN button
• Press and Hold the SIDE button until an Apple logo appears and then release the Side button (Can take up to 20 seconds. (DO NOT release Side Button when invited to Slide Power OFF). 

Axel F.

If it works on one App then it will work on many others. If it doesn't see the pic below