Back camera only works when phone is completely reset but stops working again after being switched off...

Hi leighmcgrath24,

Sorry to hear that your iPhone is having issues with the camera on your iPhone. For most issues when the lens does not open can be resolved with the steps below, though you may have to Contact Apple Support if it still gives you issues.

Get help with the camera on your iPhone, iPad, or iPod touch

https://support.apple.com/en-us/HT203040

You see a closed lens or black screen

If you see a closed lens or black screen when you open the Camera app, try these steps:

1. Make sure that there’s nothing blocking the camera lens. If you’re using a case, try removing it.
2. Force the app to close, then open the Camera app again.
3. Restart your device, then open the Camera app again.
4. If your device has a front and rear camera, try both cameras by tapping the camera swap icon. If you see the closed lens or black screen on only one camera, take your device to an Apple Retail Store or Authorized Service Provider for more help.

Take it easy,

-Norm G.