I was having problem installing basix. cwm kept telling me it could not install the zip file. I decide to change my micro sd card to the orginal which came with the phone. Then it worked perfectly. This 16gb SANDISK 4 has been giving me other issues too. Music will say format not supported, some pictures taken with the camera will be black. Can someone give me a list of brands which will work with this phone properly and which class I should purchase. Thank you.