I bought an 8gb lexar micro sd a while ago for my LG 9100, it worked for a few months but my friend put it in their phone and reformatted it.. because their a complete genius (sarcasm) and now it doesn't work. I've already reformatted for MS-DOS (FAT) with disk utility on my mac, but it still doesn't work.. suggestions? and i've already turned my phone off and on so don't suggest that...