I purchased a 32GB microSD card on eBay. It is a Kingston but the packaging was Chinese. I put it into the phone, formatted it, and all works well except videos. I can play podcast videos just fine but every time I copy a movie file - that played fine on my 16GB card - onto the 32GB card the phone refuses to play it. And, if I copy the file off the card and onto my computer again it can't be played there! There was even a time when I took a movie that was on my 16GB card, copied it to the 32GB card that is in the phone, and it played! I'm really at a loss on this one.