Q: My iphon 6 plus cammera can not focus after ios 8.3 update

Greetings Hossein_ashiri,

If you are having an issue with your iPhone's camera giving poor image quality, such as poor focus, I would suggest that you troubleshoot using the steps in this article - 

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

Thanks for using Apple Support Communities.

Be well,

Brett L