I just received my Nexus 5 yesterday and I'm real disappointed. Serial number 312KPGSxxxxxx, and it has the small speaker holes and both the power & volume buttons rattle. I compared it to my son's phone from from the release date first run, and the only difference I see is that my sim card door sits flush better than his. Our max volumes playing the same MP3 are the same. I thought they fixed these problems. Why are they shipping the phones with small holes and rattling buttons again? Should I expect a replacement to be better?