I'm running through the steps on my Samsung Captivate 2.2 Froyo. I'm on step 4; specifically "cat /sdcard/nv_data.bin >> /efs/nv_data.bin". When I try to run this command I get the error, "write: Math result not representable". In that link you provided, someone has the exact same problem, but doesn't detail how they fix it. I was wondering if anyone out there might know the answer? The post said something about doing CAT the long way.