I recently bought an avail z990 , it came with a 2 gb mem. card i swapped it out for a 4 gb card. The phone recognizes the card but will not let me move any apps or any thing to the card. I've put the old 2 gb card that came with it, unistalled , installed apps again and again and it won't let me move anything to the memory card. I took to a at&t place but they were'nt any help (i was in a different city and wasn't able to leave my phone them). I don't know what else to do ? Please help somebody !!!!!!
Try reformatting the cards as FAT32 using your PC. You can also try a factory reset on the phone (backup any personal data first). Other than that, going to your local AT&T store for a replacement or repair is probably all you can do. Since you're having problems with 2 SD cards, my hunch is that something is wrong with the phone.