My Galaxy Nexus clearly has a radio issue; my friend's GN will get MUCH better service in the same room. The problem is, I am rooted and unlocked. I understand that to return it, I should restore to factory and relock the bootloader. Will this tool work? http://www.droidforums.net/forum/galaxy-nexus-development/188161-how-return-your-galaxy-nexus-100-stock-locked-bootloader.html Thanks!