Originally Posted by codejunkie83
Unfortunately, it does not work. I get a successful message, but nothing happens on the phone. The next command I run on the phone (no matter what it is) gives an error message that custom splash could not be shown.
If you flashed the GPE Conversion RUU you will never be able to unlock via HTC Dev because that RUU writes sp1.img to mmcblk0p13 where the custom splash screen is stored and it's not the correct one for non-GPE devices such as AT&T, TMO, or the Developer Edition.
For these devices that have been converted to GPE they will always show something like:
[DISPLAY_ERR] sp_custom partition: sp_custom_img_hd read error!
when attempting to unlock the bootloader by flashing the unlock token.
Unfortunately, even flashing the correct firmware.zip for the device (such as the 4.18.502.7 firmware from the OTA) won't fix it because firmware zips generally do not include the splash screen files sp1.img or splash1.nb0; these are only included in a full RUU.
Only hope is to wait for a 4.18.502.7 signed RUU from HTC.