If your iPhone came with 4.02.13_G (aka 1.1.2) OUT OF THE BOX then do NOT use this unlock yet.
It hasn't been tested with bootloaders other than BOOT03.09_M3S2
Very new iPhones (and all U.K. iPhones) come out of the box with BOOT04.06_M3S2.
If you're in doubt, check the output of bbupdater -v or go into minicom and issue at+xgendata