[grant516]

naah, i unlocked a sprint and a tmobile refurb for free might i add... i was having the same USB connection error 264 when trying to unlock the sprint refurb. i tried 2 different computers on 2 diff OS's and nothing i tried worked except a hard reset. this is what i did...

1) flash stock 6.5 rom
2) after the rom is loaded, hard reset.
3) after hard reset, do not press "vol up" to boot. instead turn your tp2 off
4) next, press and hold volume down and power keys until bootloader comes up.
5) if you look at the screen on your tp2, you should see "serial" at the bottom in the white area. this should change to "usb" when its recognize by the pc. this means your tp2 is connected and ready to unlock.
6) run the hspl, it should work fine without randomly losing the usb connection to your pc..

I have tried this method to no avail.

I cannot unlock the Hard SPL with my newly refurbed TP2, and the current unlocker program.