After updating my iphone X, i can no longer use mu back camera.
How to fix my iphone x back camera?
iPhone X, iOS 15
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Best reply
First try a Forced restart Force restart iPhone – Apple Support (UK)
If no better you should arrange a repair iPhone Service & Repair - Apple Support
Or
Contact - Official Apple Support
Anything other than Screen or Battery may be a replacement phone and the price is in the article under "Other damage"
See also: Get your iPhone, iPad, or iPod touch ready for service - Apple Support