Rooting & Custom ROMBefore you begin,
here is a good read written by our very own LYn bro shahz. Do read it up before you begin your adventure here.
WARNING: Before you continue, please note that no one will be responsible for any bad things that might happen to your Desire HD by following the guides and procedures written here.
In short, we will not be held responsible if your bricked phone caused you to get fired from work, late for school, kicked out of the house, breakup with gf, missed the bus, become foreveralone, etc etc. 
Some FAQs before you continue:1. I am lazy to read the above explanation of the various term. Just tell me what is root and flashing custom ROM.
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Simply put - Rooting is the process to gain the SuperUser status of the device so you can do modification to the system. Flashing ROM is like installing a different flavour of system into the device. You can do Rooting only, to be able to use certain application like Titanium Backup and Shootme, but no need to go further if you do not want to. However, if you want to Flash custom rom, then you must first Root the phone first before you can flash new rom.
2. Will rooting and flashing new ROM void my warranty?
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Yes. Rooting and flashing will void the warranty of your Desire HD. However if you are able to flash back the original rom and UnRoot it before you send it back to HTC for warranty/service, it should not be a problem.
3. I need someone to brief me on how to flash a custom ROM!
(read with care!!!)» Click to show Spoiler - click again to hide... «
YOU ARE SUGGESTED TO HAVE HTC SYNC INSTALLED IN YOUR COMPUTER FIRST BEFORE PROCEEDING!!!(Available in your SDCard\HTC Sync or download it here------------------------------------------------------------------------------------------------------------------------------------------------------------------------
**HOW TO FLASH RECOVERY & INSTALL ROM** ~~~~~~~
assuming you did permarooted, Radio S-OFF, ENG S-OFF
If not, read syuki's guide below. Much detailed with FULL steps» Click to show Spoiler - click again to hide... «
Install ROM Manager (get it from Market) and then open the ROM Manager app and flash the RECOVERY (your WiFi/MobileData must be ON), after done flashing the RECOVERY, REBOOT TO RECOVERY (do this from ROM Manager menu)
- Download ROM and place it on your SD card
- Format Data / Format Cache
- Go to ADVANCE menu > Wipe Dalvik Cache & Wipe Battery Stats
- Go back and select "install zip from sdcard"
- Select "choose zip from sdcard" & point the location of .zip file
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**HOW TO ROOT & FLASH** ~~~~~~~credit to
syuki» Click to show Spoiler - click again to hide... «
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**HOW TO FLASH RADIO IMAGE**
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4. I just flashed a new ROM and now my internet is not working. How to solve this?
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Check your APN.
Menu >> Settings >> Wireless & Networks >> Mobile Network Settings >> Access Point Names
Example on how to use below information» Click to show Spoiler - click again to hide... «
Image provided by
koinibler. Thanks!
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1. DiGi Internet
APN: diginet
Proxy: not set
Port: not set
Username: not set
Password: not set
Server: not set
MMSC: not set
MMS proxy: not set
MMS Protocol: WAP 2.0
MCC: 502
MNC: 16
APN Type: default
2.
DiGi GPRSAPN: digiwap
Proxy: 203.92.128.188
Port: 80
Username: digi
Password: **** (I assume digi)
Server: not set
MMSC: not set
MMS proxy: not set
MMS Protocol: WAP 2.0
MCC: 502
MNC: 16
APN Type: httpproxy
3.
DiGi MMSAPN: digimms
Proxy: not set
Port: not set
Username: mms
Password: *** (I assume mms)
Server: not set
MMSC:
http://mms.digi.com.my/servlets/mmsMMS proxy: 203.92.128.160
MMS port: 80
MMS Protocol: WAP 2.0
MCC: 502
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WAP
.Name : Maxis
.APN : (NOTE: unet for 3G or net for GPRS)
.Proxy : 202.75.133.49
.Port : 80
.Username: maxis
.Password : wap
.Authentication Protocol:
MMS
.Server : Maxis MMS
.MSC : http: //172. 16.74.100:10021/mmsc
.MMS proxy : 202.75.133.49
.MMS port : 80
.MCC : 502
.MNC : 12
.APN Type : default
MNC: 16
APN Type: mms
Celcom» Click to show Spoiler - click again to hide... «
1) Home -> Menu -> Settings -> Wireless & networks -> Mobile networks -> Access Points Name
2) Menu -> New APN
Name : Celcom 3G
APN : celcom3g
MMSC:
http://mms.celcom.net.myMMS Proxy : 10.128.1.242
MMS Port : 8080
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Flash
This via CWM recovery (CWM 3 only). (Credits to Atsutane for making the .zip
)
5. How do I backup my apps, contact, apn, etc before I root my phone?
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You can do backup by various way using this utilities;
Google >>> contact, application
Mybackup root >>> almost everything except ROM
Titanium backup >>> apps, data
You also can backup data by application;
SMS >>> SMS Backup, SMS Backup & Restore, GO sms
Contact >>> People, Google,
6. Please guide me to flash kernel only!
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For easy understanding, you can watch this video and at the same time, flash kernel using
Kernel Update UtilityP/S: Make sure after plugin usb cable, choose
charge only. You can download the tool at Post #8..
7. How to downgrade to stock 1.3.x ROM from 1.8.x Official ROM (FOTA)?
credits to JenLOI» Click to show Spoiler - click again to hide... «
How to downgrade 1.7x/1.8x to 1.32.405.6
Credits: Scotty2, rhcp, jkoljo and Guhl
Personally tested and work with Digi DHD, and wanna help others with new 1.84 build too. I did rewrite some part to make it more understandable, and include some missed steps.
About:
The problems started when HTC released their 1.84xxxx OTA update. That update could not be rooted, and many people got stuck in stock roms. Now a downgrade method has arrived! After this process, you can use any root (+ S-OFF) method you want. Basically your device will be just like any other Desire HD with OLDER BUILD VERSION.
System requirements:
HTC Sync (or ADB drivers)
Desire HD with build number 1.72 or higher (1.84)
How to downgrade:
IF you have a branded device, you have to make a Goldcard. Use "mmc2",
IF you dont have a branded device, Use "mmc1"
Digi machine is branded, so use "mmc2" and needed to make a GOLDCARD, check post 2.
Let's Begin,
Download the Downgrade ZIP and extract it in c:\ (C:\Downgrade)
Get stock 1.32 PD98IMG.zip ROM
Connect Desire HD to a computer. Charge only, USB Debugging enabled!
Open up a cmd and go to Downgrade folder, (can try holding shift and right click on the folder to open up a cmd to this folder)
Go to cmd execute below:
adb push psneuter /data/local/tmp
adb push misc_version /data/local/tmp
adb shell chmod 777 /data/local/tmp/psneuter
adb shell chmod 777 /data/local/tmp/misc_version
adb shell /data/local/tmp/psneuter
adb shell
If you got "#" in the result, you have temproot! Proceed:
cd /data/local/tmp
./misc_version -s 1.31.405.6
Go to your DHD, switch connection to disk,
Put PD98IMG.zip to your SD card.
You can close the cmd and set connection to disk drive.
Reboot while holding volume down, it will go to the bootloader
Follow the instructions
Done.
You can now proceed with old S-OFF methods with syuki guide and remember remove the PD98IMG.zip from your SD. I recommend Radio S-OFF for new users.
Troubleshooting:
- "Main version is older"? You did not type everything correctly. Please try it again and see if any errors come up.
- "Error opening backup file"? You did not use "Charge only" -connection, or your SD card is faulty.
- "CID mismatch/CID incorrect"? Your device is branded.
Just make a Goldcard, put the PD98IMG.zip to the card again and go to the bootloader.
- Zip will not load in bootloader? Format your SD card to FAT32, no quick format! You can try another SD.
- Problems while making Goldcard? See this post.
- PD98IMG.zip md5sum is: C3D244A9F056E48EE3851A14FF52204C
FAQ:
Q: Will I lose all my settings and applications?
- Yes, so make a backup with MyBackup Pro.
Q: I have done Radio S-OFF and SuperCID, do I need this?
- No, with those you do not need this kind of trickery.
Q: It says '#' but I still cannot use root applications!
- That is normal, this method only gives root in command line. Just go ahead and downgrade.
Credits: Scotty2, rhcp, jkoljo and Guhl
8. How to prepare a
Goldcard (For downgrading BRANDED devices) -
prepared by JenLOI» Click to show Spoiler - click again to hide... «
HOW TO MAKE A GOLDCARD
This guide explains how to create a GoldCard. A GoldCard is a special SD card which, when inserted into your device, allows you to flash RUU files with a different CID to your own device.
Requirements
Spare microSD card (any size, recommended 2GB - should be enough)
Windows PC (recommended)
ADB (part of the tools folder of the SDK, available for download here
http://developer.android.com/sdk/index.htmlHxD Hex Editor, available for download here
http://mh-nexus.de/en/downloads.php?product=HxDStep by step instructions
Format the microSD card to FAT32 format , allocation size 512 bytes, untick quick format. (please use normal format)
Put the microSD card in your device and boot it.
Ensure you have unzipped the SDK, then open a command prompt to the extract location. Change to the 'tools directory.
Enter 'adb shell cat /sys/class/mmc_host/mmc2/mmc2:*/cid'
You should get a very long number which looks like this: "532600bd227d9c0347329407514d5402"
Visit this page
http://hexrev.soaa.me/, paste in your number and reverse it. In our example the result would be 00544d5107943247039c7d22bd002653.
Visit this page
http://psas.revskills.de/?q=goldcard, enter your reversed number and create your goldcard image, which will be e-mailed to you.
Open the HxD hex editor.
If you are using Windows Vista or Windows 7, you must run the application as administrator.
In HxD hex editor,
Go to the 'Extra' menu and select 'Open Disk'.
Under physical disk, select Removable Disk (your microSD card), uncheck 'Open as Readonly' and click OK.
Note that you should select physical disk NOT the logical disk. This is important!
Go to the 'Extra' menu again and select 'Open Disk Image'. Open the goldcard image that you received by email.
You should now have two tabs - one is your removable disk, the other is your goldcard image.
Press OK when prompted for 'Sector Size' (selecting 512 (Hard disks/Floppy disks)) and click OK.
Click on the goldcard image tab.
Go to the 'Edit' menu, choose 'Select All' then select the 'Edit' menu again and select 'Copy'.
Click on the 'Removable Disk' tab.
Highlight offset (line) 00000000 to offset (line) 00000170 (including the 00000170 line), then click on the 'Edit' menu and select 'Paste Write'.
Click on the 'File' menu and select 'Save', accepting the warning.
You now have a goldcard!
Credits: MiSSigNNo, Paul
May 26 2011, 02:30 PM
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(I hope winter-X already reserved all post up there. 
of course i am...thanks syuki for your guiding... 
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