[HD2 Windows Mobile 6.5 Q&A, Help & Troubleshooting] Hahutzy:
- This assumes you already have HTC Sync installed.

- SPL was 2.10

- Radio was 2.10.(something)

- For the purpose of this guide (as of 07Nov2011), I'll be aiming for running SD Android on this Tmo HD2.

1. Get enterbootloader.exe for WinMo 6.5, put it on your sdcard

here

2. Go to your HD2, run enterbootloader.exe from File Manager

3. Plug in your phone to your Windows 7 comp. HD2 will install driver and Windows Mobile Device Centre automatically. Your phone should now be in SPL 2.10, and the bottom of the screen says "USB".

4. Get HSPL4

here

5. Unzip HSPL4 and run it. Choose HSPL 2.08

6. Phone reboots, loads to WinMo 6.5. Run enterbootloader.exe again

7. On your comp, follow this guide to flash Radio to 2.15.50.14:

here

8. Disable Sense on WinMo6.5 for smoother startups...

here

9. For me personally, I went with NexusHD2 3.2a SD Android:

here

10. Install Exceller's Autoboot on WM6.5 to autoboot Android

here

11. Once in android, grab the app BatteryCalibration by Nema to calibrate the battery.

details here

First result: AmeriCanAndroid taking hours to load...

Update: trying NexusHD2 3.2a

Update: Success! Battery life is kinda abysmal so far though, even with an extended battery.

Update: I think it's just not calibrated properly. I rebooted and it went back up.

Update: NexusHD2 3.2a running stable. I heard it doesn't have USB Mass Storage though. Will move on to NAND builds as soon as ASOP Ice Cream Sandwich builds start showing up. Vanilla Ice Cream Sandwich builds.

Update: Silly me, turns out USB Mass Storage is working fine.

Update: Looking at going from SD Builds to NAND builds. DO NOT USE MAGLDR! Without volume buttons, you'd be screwed. Looking at cLK feasibility...

Update: cLK supports volume-button-less boot to clockworkmod, and newest clockworkmod supports volume-button-less flashing of ROMs!

Here goes:

A little on cLK. When booting:

Enter fastboot mode by holding Back key (left arrow).

Enter recovery mode (CWR if installed) by holding Home key.

Enter bootloader mode by holding Volume Down key. Irrelevant in this case.

12. Back up all your stuff that you wish to keep on Android (text, apps, contacts, etc)

13. Delete the SD build you were using.

14. Boot to WinMo 6.5, and go to boot loader by using enterbootloader.exe

15. Follow the HD2 general guide on how to install cLK (now that I know, I would've went with cLK 1.4.0.1, using a layout of 260+44)

here

16. Install Android SDK from the zip file and install CWR following the HD2 general guide

here

17. Need to find a stock boot.img, system.img, data.img for fastboot..

Update: So far I only found 1 ROM that claims it can be flashed using cLK - fastboot

It's MDJ Revolution HD

here

Trying it right now ---- It's too big, my cLK partition couldn't fit it in...

Found out 2 things:

1. I flashed cLK 100Mb partition 44Mb cache because I used Custom RUU on the entire layout .rar and the 100/44 one is first in filesystem name

2. Flashed the newest CWM and it's navigatable by Home and Menu button!

So now, I'm on my way to trim and flash HyperDroid, slimmest one out there I think.

Created a 512Mb EXT partition on my SD card. This WILL wipe you SD card!

18. After trimming the /system folder down to less than 100Mb (unpacked size), complete success.

Trimmed HyperDroid here

v2 of Trimmed HyperDroid

Update Feb10: Xylograph released an ICS ROM that uses 100Mb! I'm using it right now. Check it out here!