Anyway, I don't think "his" method bypasses the need for root - it is not possible to change a setting encoded in the NAND and make the change permanent otherwise. I think he's using one of those "magic boxes" my friends who repair phones have - you hook the phone to it, it searches for the SIM lock bit and brute forces it. But to write the new setting, you need at least temp root.
We did try my 005SH on one of my friends' "magic boxes" but it could not detect the phone's NAND. There are dozens of different boxes out there...
If someone will help me complete the translation of that Japanese readme I uploaded a while ago, I am ready to experiment on my 005SH.
Of course, sooner or later the info on how to unlock the 003SH, 005SH and 007SH will leak out - many Japanese people already know it, and others too. Plus the phones are getting obsolete incredibly quickly and it is absolutely pointless to pay $150 dollars to unlock such a phone. I would gladly pay $50, which I consider reasonable.