Whenever i put my micro sd card into the phone, the card doesn't click in or aything and when i close the slot it doesn't hold the card in. My dad and sister have the same phone and its the same problem. I am forced to hold it down everytime i want to use it.
I thought I had the same problem - turns out I just wasn't pushing the card far enough into the phone. My son was able to push the card in easily, and when I saw how he did it I realized how it worked. Another option would be to go to a Sprint store and have them take a look.