My iPhone 7 Plus yesterday work front camera but doesn't work back camera that's come to black screen today I will be update my phone but now not working both of. So how can i fix that issue

See this support document. If you cannot fix it from there, the last step is to contact Apple Support. Get help with the camera on your iPhone, iPad, or iPod touch - Apple Support

Wahab871 wrote:

I have iph7plus but camera fornt camera not working also black screen for both camera when you capture the photo comes to back camera I don't now what happ

Look at the support document in my post. If you cannot get it to work, contact Apple Support.

Hello

I have iph7plus but camera fornt camera not working also black screen for both camera when you capture the photo comes to back camera I don't now what happ

Mine has done the same thing since updating. Lots of problems.