I have an ATT Samsung Galaxy S4. I used a kingston 32 GB micro SD card. It worked perfectly fine and had no problems. 2 months pass, the SD card dissapears from the phone and cannot be detected. I contact Amazon and get a replacement, well a month later another SD card is sent and broken. I cant help but think that it is the phone and it is very annoying as I keep losing Data and Files. Anybody else have this problem??? I dont know what else to do. I am too afraid to buy an SD card and I am running out of space on the actual phone.