DMFN "DMFN"
I guess I should be happy it failed after only 1 month, because I only lost 1 month's worth of pictures etc.  I bought 3 of these cards for my wife, son and I.  My wife's had a minor glitch, which went away with a reboot.  Mine had a minor glitch this morning, so I expected the reboot to fix it.  No a reboot caused my Motorola Defy XT to tell me the card was blank and needed to be formatted.  My laptop won't even recognize the card when I put the card in it's reader.  After a couple hours of looking for a way to fix it, I have only found that this is very common for this specific card.EDIT: I was very happy with Sandisk after calling them.  They did say there are compatibility issues with CLASS 10 cards and some of the Android phones, and verified my phone is one of them.  They offered free replacement with a card that would be certain not to have the same issue mine just had, and also to attempt recovery of my items from the card.  These are the reasons we buy sandisk in the first place.  They did recommend a Class 4 or lower card to me for this phone.I am leaving this as a 1 star, because people should be aware of compatibility issues this severe.2nd Edit:  As of March 12, this replacement card, that wasn't going to "be susceptible to the same type of failure" is losing apps etc.  I am giving this card up.  It has taken my phone and turned it into a device I cannot count on.