I have had this issue with both the ZMax Pro and the Blade ZMax. After receiving an error on my phone and having to reset the phone back to the factory settings I received an error message that the card is unsupported. I backed the card up and tried reformatting and still no luck. I have had to purchase new cards after each reset. I purchased the Blade on it's release date in August. Sunday the phone shut off and when I powered it up, it said the launcher was not working, this is the same issue I had with the Pro. I cleared the data for the launcher and reset the time and I eventually had to reset the phone. Now I have to purchase a new SD card. Is this supposed to happen? Has anyone else had this issue?