Dark/Color spots on all pictures taken with rear camera on iPhone 6

Hello there, Nimesh88.

It sounds like you are experiencing undesired image quality on your iPhone 6. The following Knowledge Base article provides some great recommendations for troubleshooting:

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

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

Your photos are blurred or out of focus

If your photos are blurred, out of focus, or have dark spots, try these steps:

1. Make sure that the camera lens is clean. If you need to clean the lens, use a microfiber cloth. If you see dirt or debris inside the lens, take your device to an Apple Retail Store or Authorized Service Provider for more help.
2. With iPhone 6 Plus and iPhone 6s Plus, a metallic case or magnetic lens could interfere with optical image stabilization. Try taking a picture without it, then compare the quality.
3. Adjust the focus by tapping on the person or object in the preview screen. You’ll see the screen pulse or briefly go in and out of focus as the camera adjusts. In photo mode, try to stay steady when adjusting the focus. If you move too far in any direction, the camera will automatically refocus to the center. In video mode, you can adjust the focus before you begin recording.

If you still have issues with the focus on your camera, contact Apple Support.

{...}

If you still need help

If you still can't take a photo, your photos don't look right, or you need help with something else, contact Apple Support.

Thanks for reaching out to Apple Support Communities.

Cheers.

Hello there, Nimesh.

Thanks for the follow up. If you've gone through these recommended steps and the issue persists, then due to the nature of your issue, it may be best if we get you in contact with someone who can look into this further. You may find more information by using another one of Apple's support resources - https://getsupport.apple.com

Sincerely.