just to add that on my MyTouch 4G slide I had hboot-1.44.0007 and gave me the same error as the first post when trying to unlock through htcdev.com. I did an OTA update to HBOOT-1.45.0013 (Software version 1.63.531.2 710RD) then went back to htcdev.com and it worked without problems
Many usersdon’t see any particular reason to change out the stock firmware … more
28 Aug 2014
By Tomek Kondrat
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?