I have the Droid Razr HD 4.1.2, it is rooted but not unlocked. At my school they have jammed my mac address from being able to use my mobile hotspot. They have only jammed my hotspot not anyone else's. So using a different mac address should work, but all of the programs I use are not working. I have tried the Mac address ghost which turns off every time I turn on the hotspot no matter the settings unless the interface is something different than eth0 or wlan0. I have tried the terminal thing, but I keep getting errors saying it doesn't read the "ether" comand when writing ":busybox ifconfig eth0 hw ether 00:11:22:33:44:55". So if anyone has any idea's that would be great.