Hi everyone, I just recently got a HTC one x and am really pleased with it. The only issue is that I cannot unlock the bootloader. I have tried every way under the sun but every code that is given me is getting an error that says not a valid mei. I have tried at least 15 times with no success. Also, I wanted to point out that I do not have a sim card in the phone because it is just a toy now. I don't know if this is something to do with it or not.