I just received my card, it is the class 10 64GB with the correct serial#SDSDQUA-064G-A11A. I received it in an unopened SanDisk packaging. I am going to use it on my HTC Rezound, I hope it works. From what I have read, it will work after reformatting the disk. I will update this review if I have any issues using it, if not, my rating will remain unchanged...