Please read a little more carefully. The iPhone with 4.6 bootloader IS unlockable without opening the phone. Its no secret and quite publicly available information. Open google and have a look. Next SIM and Turbo SIM both work quite well.
I have not tested on the new 1.1.3 firmware as of yet but have been told more than likely it will brick the phone by upgrading to it.
Not that it matters another unlock will be available VERY soon for 1.1.3 also.
I can and did read carefully, I specifically mentioned software unlock at least 2 times in my posts.
Congratulations on your phone!