That's more than a year old, and the calibration issue was fixed long ago.
Source?
Now to be honest, these kinds of problems and complaints are pretty standard levels for second rank manufacturers. You need the high volume of Samsung or Apple to be able to get the manufacturing fully tuned.
Oh yeah, such things never happen with Samsung. "If you don't know about them then it's for you to Google", good advice, you should use it too.
In the old days, Nokia could use their own factories to build and optimize quality.
Those old days were a long way ago... Please, it's the company that gave me an N81 with brittle nonsensical buttons at the top and fastened the USB/power port to the N900's system board with a bit of dried out snot. The quality of Lumias feels like a huge improvement.