Me and my friend have the same phone (Nexus S I9023) I have the black version , and he has the white one.
Both phones are running on Jelly Bean 4.1.1.
The problem is with the Camera, when I take a photo with his phone , if it's checked while taking it , it appears great with no blur or shaking.
But with my phone , if my hand shaking the photo goes unclear and that's all.
Two photos are attached to explain what I mean.(Resolution reduced for uploading)
Sorry for bad language.