Originally Posted by glevitan

It won't work if u are running GB and downgrade to Froyo...That will mess your bootloader...just don't downgrade to froyo by any means!!

First of all 2.50.405.2 is GB an not Froyo so no problem there I guess.

Originally Posted by glevitan

Hack Kit works for all builds and version, just have to downgrade first in some cases...

That doesn't sound like works on all builds and versions.
It does not work on the mentioned version 3.12.405.1

I have the same situation. But within a couple of months my phone contract will end and I will extend this with a new phone. At that moment I will try to install some custom ROMS on my Desire HD. So first downgrade to 2.50.405.2, get root and S-Off (which I by the way already have (Ship S-off to be precise))
And than install ClockWorkMod and install custom rom.
I tried to install CWM from fastboot but did not manage to successfully complete this. I think because I have Ship S-Off and not ENG S-Off.

Originally Posted by Rudios

That doesn't sound like works on all builds and versions.
It does not work on the mentioned version 3.12.405.1

AAHK has supported 3.12.40.5.1 since version AAHK 10122011, It does not and will not support HTC dev unlocked devices. Although version 3.12.40.5.1 does need downgrading, this step is carried out by AAHK. AAHK is by far the safest and easiest method of obtaining root IMHO.

Originally Posted by Rudios

First of all 2.50.405.2 is GB an not Froyo so no problem there I guess.

That doesn't sound like works on all builds and versions.
It does not work on the mentioned version 3.12.405.1

I have the same situation. But within a couple of months my phone contract will end and I will extend this with a new phone. At that moment I will try to install some custom ROMS on my Desire HD. So first downgrade to 2.50.405.2, get root and S-Off (which I by the way already have (Ship S-off to be precise))
And than install ClockWorkMod and install custom rom.
I tried to install CWM from fastboot but did not manage to successfully complete this. I think because I have Ship S-Off and not ENG S-Off.

umm...it seems that u need to give a look at the manual again. All builds 3.x are not directly rootable, so you need to downgrade. The Hack Kit prompts you about that, and do it in case you are willing to.

Just one tip, if you install ENG S-OFF you will mess your bootloader...so, I would check the manual and the hack kit thread just see what you not supposed to do..

Originally Posted by Rudios

First of all 2.50.405.2 is GB an not Froyo so no problem there I guess.

That doesn't sound like works on all builds and versions.
It does not work on the mentioned version 3.12.405.1

Yes it does, but a downgrade is needed first. The hack kit automates it all as much as possible, even the initial downgrade.

The bootloader MUST be relocked and the the ROM stock.

Originally Posted by ghostofcain

AAHK has supported 3.12.40.5.1 since version AAHK 10122011, It does not and will not support HTC dev unlocked devices. Although version 3.12.40.5.1 does need downgrading, this step is carried out by AAHK. AAHK is by far the safest and easiest method of obtaining root IMHO.

Just relock the bootloader with a stock rom/recovery installed and the hack kit will work fine.