Disclaimer: You could brick your phone and/or void your warranty. What you read here and then attempt to do is at your own risk. I am not responsible for what you do with your phone, PC, Mac, or whatever else you are messing around with. Proceed at your own risk.

I received a replacement MT3G after successfully rooting, then subsequently bricking my phone attempting to install an incompatible ROM that updated the SPL. Rooters beware. Below is how I rooted my replacement phone that came with stock Android 1.6 build DRC92 and the perfect SPL 1.33.0007. The combination isnt bad to root IF you have the correct files and a Goldcard.

1. Download and save the file 2.53.707.2_-_sappimg.zip from http://rapidshare.com/files/267446145/2.53.707.2_-_sappimg.zip
   • Discussion thread: http://forum.xda-developers.com/showthread.php?t=548218
2. Power down your phone
3. Remove the back panel
4. Remove the SD card
5. Insert the SD card into your PC
6. Copy the zip file to the root of your SD card, no folder
7. Rename the file to "sappimg.zip" if it isn’t already, be sure that it isnt "sappimg.nbh.nbh"
8. Put the SD card into your phone
9. Enter "FASTBOOT Mode" on your phone by holding the Volume Down and Power buttons (you can also use the Back and Power buttons) 
   • The screen will turn white with three little green robots on the bottom
10. Click the trackball and wait for it to pick up the "sappimg.zip" file
    • It may be necessary to press the down volume button, followed by the back button
11. Click the trackball again to begin, it should automatically update from there
    • If you do not get "Update Complete!" you will need to build a Goldcard and try again: Here is how to create a Goldcard – http://thatsbadass.com/android/2010/02/08/goldcard-build/
12. Once complete, reboot the phone

Sometimes a Goldcard is necessary to successfully install the sappimg necessary to root your phone. Below is the process for creating that Goldcard. I used the original card that came with my phone. Some card do not support this process so you may need to try a few.

First you will need to download a couple things:

1. QMAT: http://www.tucows.com/preview/605064
2. HxD Hex Editor: http://download.cnet.com/HxD-Hex-Edi…=uo&tag=button

Here is the process:

1. Extract the file qmat.exe file from the QMAT download
• This will be used to reverse the CID you get from your phone. This can also be done manually by breaking the string into two character sections then reversing it

Example CID: A0B1C2D3E4F5G6H7I8J9KaLb (32 digits)
Breaking CID into 2`s: A0-B1-C2-D3-E4-F5-G6-H7-I8-J9-Ka-Lb
Reverse: Lb-Ka-J9-I8-H7-G6-F5-E4-D3-C2-B1-A0
Remove Dashes: LbKaJ9I8H7G6F5E4D3C2B1A0

2. Format your memory card to fat32. This does not work on all cards.
3. On your phone search the Android Market a ‘Terminal Emulator’.
4. Once installed open the Terminal Emulator and type ‘cat[space]/sys/class/mmc_host/mmc1/mmc1:*/cid‘ without the quote signs or the [space].
5. Write down the code on notepad or something, preferably somewhere you can copy and paste into QMAT.
6. On your computer execute the qmat.exe file that you extracted earlier.
7. Click on Cryptanalysis Tools > Crypto Toolbox
8. Look near the bottom of the application, there is a text box next to the “Reverse String” button.
9. Enter the CID number from step 5
10. Click on the “Reverse String” button.
11. Write down the code on notepad or something and replace the first two characters with 00, preferably somewhere you can copy and paste into the QMAT Goldcard created.
• Example: “532600bd227d9c0347329407514d5402” changes to “002600bd227d9c0347329407514d5402”
12. Go to QMAT to get your Goldcard: http://revskills.de/pages/goldcard.html
• This is free for G1 phone, Thanks to Viper! (also works with the myTouch3G)
13. Enter your email.
14. For the CID, enter the reversed CID from step 12 with the 00 replacement.
15. Click Continue and you will receive the goldcard.img via your email.
16. Go to your email, download the goldcard.img and save it to a directory.
17. Install the HxD Hex Editor you downloaded
18. Launch the HxD Hex Editor
• Windows 7 and Vista users may need to run the program as Administrator
19. Go to Extra tab
20. Click Open Disk
21. Select Physical disk
22. Select Removable Disk (this is your SD card)
• Make sure you choose Removable Disk under Physical disks, not under Logical disks
23. Uncheck “Open as Readonly"
24. Click OK
25. Go to Extra again
26. Click Open Disk Image
27. Select the goldcard.img you saved from your email.
28. Make sure Sector Size "512 (Hard disks/Floppy disks)" is selected
29. Click OK
• Now, you should have two tabs, one is your removable disk, the other is goldcard.img.
30. Go to the goldcard.img tab.
31. Go to Edit
32. Click Select All
33. Click Edit again
34. Click Copy
35. Click on the “removable disk” tab.
36. Select offset 00000000 thru offset 00000170
37. Click Edit
38. Click Paste Write
39. Click on File
40. Select Save
41. Close HxD
42. Remove the SD card and plug it back in
43. If you get the message to format the card when it is reinserted it is not compatible with the Goldcard process. You will need to try again with a different card.

This is an update to the post: SenseHERO-v1.4 With Theme on myTouch3G

After getting all set up I am again re-ROMing…

The ROM started slowing dramatically after a couple days of use, keyboard inputs stick causing multiple repeats of the letter I was trying to type, a few force close issues, and general lag when trying to use the device. Using Advanced Task Killer Free I am seeing my available memory down around 16mb with nothing running. Not sure why it started slowing so badly.

Next… Probably back to the custom MGHTYMAX…

Here is what I had set up and installed:

• Hero Clock w/ Weather
• Medium Hero Calendar
• Large Hero Contacts
• Large Hero Bookmarks
• Exchange Email
• SMS

• Advanced Task Killer Free
• Google Maps
• Better Terminal Emulator
• Bonsai Blast
• Facebook
• Frozen Bubbles
• Gem Miner
• Last.fm
• LukLuk
• Mediafly Mobile Audio Podcasts
• Pandora
• Robo Defense Free
• SpectalView Analyzer

ROM Info: http://db.androidspin.com/android_developer_display.asp?developerid=19

ROM Download: http://db.androidspin.com/androidspin_filedownload.asp?release=42&type=2

My Fastboot Info:

• Sapphire PVT 32B
• HBOOT-1.33.2009
• CPLD-10
• RADIO-2.22.19.26I
• May 6 2009

Process (adding more detail to this post):

1. Download ROM
2. Download update BFS-230 (you can choose another if you like)
3. Reboot into Recovery Mode
4. Wipe
5. Partition 16GB, ext4, see Partition The SD Card Using Amon Ra and ADB
   • 15.4GB  primary  fat32
   • 500MB   primary  ext4
   • 202MB   primary  linux-swap
6. Remove cover from phone
7. Pull battery
8. Remove SD card
9. Connect SD card to PC
10. Copy ROM and update to SD card
11. Insert SD card back into phone
12. Enter "Recovery Move" on your phone by holding down Home and Power buttons until the recovery screen comes up
13. Install ROM
14. Install update
15. Updated swap to 90, see Increase Your Swap File Permanently
16. Testing but like it so far

Pros:

1. Exchange Email (Data synchronization)
2. Exchange Contacts (Data synchronization)
3. Exchange Calendar (Data synchronization)
4. Gmail (Data synchronization)
5. Email (Other)
6. Facebook (Social Networks)
7. Facebook and Contact Photo Integration
8. Twitter (Social Networks)
9. Flickr (Social Networks)
10. Hero Clock w/ Weather
11. Expanded HTC Contacts Widget (instead of a vertical scroller you have a full screen widget)
12. Browser w/ Pinch
13. Browser w/ Mobile View On/Off Option
14. Picture Viewer w/ Pinch
15. Hero soft keyboard
16. Auto-rotate works
17. Decent background selection
18. Decent speed with widgets (average around 20mb available after killing everything with Advanced Task Killer Free)
19. Nice blue color to UI
20. Pretty clean lock screen
21. Cool to have both Sense, aka Hero, and Original UI’s to use

Cons:

1. Doesn’t seem to use APPS2SD (still testing)
2. Display goes dark when switching Scenes

ROM Info: http://db.androidspin.com/android_developer_display.asp?developerid=19

ROM Download: http://db.androidspin.com/androidspin_filedownload.asp?release=42&type=2

My Fastboot Info:

• Sapphire PVT 32B
• HBOOT-1.33.2009
• CPLD-10
• RADIO-2.22.19.26I
• May 6 2009

Process:

1. Download ROM
2. Wipe
3. Format
4. Install ROM, see Installing Custom ROM’s

Pros:

1. Exchange Email (Data synchronization)
2. Exchange Contacts (Data synchronization)
3. Exchange Calendar (Data synchronization)
4. Gmail (Data synchronization)
5. Email (Other)
6. Facebook (Social Networks)
7. Facebook and Contact Photo Integration
8. Twitter (Social Networks)
9. Flickr (Social Networks)
10. Hero Clock w/ Weather
11. Expanded HTC Contacts Widget (instead of a vertical scroller you have a full screen widget)
12. Browser w/ Pinch
13. Browser w/ Mobile View On/Off Option
14. Picture Viewer w/ Pinch
15. Hero soft keyboard
16. Cool to have both Sense, aka Hero, and Original UI’s to use

Cons:

1. Probably should have applied an update as mentioned in the ROM Info
2. Reboots
3. Slow, might have to do with low memory available (average around 14mb available after killing everything with Advanced Task Killer Free)
4. Doesnt seem to use APPS2SD

ROM Info: http://db.androidspin.com/android_developer_display.asp?developerid=41

ROM Download: http://db.androidspin.com/androidspin_filedownload.asp?release=88&type=1

My Fastboot Info:

• Sapphire PVT 32B
• HBOOT-1.33.2009
• CPLD-10
• RADIO-2.22.19.26I
• May 6 2009

Process:

1. Downloading ROM
2. Wipe
3. ROM’d, see Installing Custom ROM’s

Pros:

1. Exchange Email (Data synchronization)
2. Exchange Contacts (Data synchronization)
3. Exchange Calendar (Data synchronization)
4. Gmail (Data synchronization)
5. Email (Other)
6. Facebook (Social Networks)
7. Facebook and Contact Photo Integration
8. Twitter (Social Networks)
9. Flickr (Social Networks)
10. Hero Clock w/ Weather
11. Expanded HTC Contacts Widget (instead of a vertical scroller you have a full screen widget)
12. Browser w/ Pinch
13. Browser w/ Mobile View On/Off Option
14. Picture Viewer w/ Pinch
15. Good Speed (average around 30mb available after killing everything with Advanced Task Killer Free)
16. 7 screens
17. Hero soft keyboard
18. Cool little bounce to the Menu pop-up
19. Nice UI changes for button down colors, GPS icon, etc

Cons:

1. No auto-rotation
2. No Lock Screen wallpapers
3. No WiFi

In the process of installing KiNgxKxROM Sense Hybrid v2.3 downloaded from here http://db.androidspin.com/androidspin_filedownload.asp?release=103&type=1

ROM information available at http://db.androidspin.com/android_developer_display.asp?developerid=38

My Fastboot Info:

• Sapphire PVT 32B
• HBOOT-1.33.2009
• CPLD-10
• RADIO-2.22.19.26I
• May 6 2009

Process:

1. Downloaded the ROM
2. Formatted SD, see Partition The SD Card Using Amon Ra and ADB
3. Wiped
4. ROM’d, see Installing Custom ROM’s

Pros:

1. Exchange Email (Data synchronization)
2. Exchange Contacts (Data synchronization)
3. Exchange Calendar (Data synchronization)
4. Gmail (Data synchronization)
5. Email (Other)
6. Facebook (Social Networks)
7. Facebook and Contact Photo Integration
8. Twitter (Social Networks)
9. Flickr (Social Networks)
10. Hero Clock w/ Weather
11. Expanded HTC Contacts Widget (instead of a vertical scroller you have a full screen widget)
12. Browser w/ Pinch
13. Browser w/ Mobile View On/Off Option
14. Picture Viewer w/ Pinch
15. Excellent Speed (average around 30mb available after killing everything with Advanced Task Killer Free)
16. Clean Lock Screen (no box, just Carrier, Time and Date over the picture)
17. Good wallpaper selection
18. 7 screens
19. Hero soft keyboard

Cons:

1. No auto-rotation
2. Carrier Internet Reads "H" (normally T-Mobile reads "3G")
3. No Lock Screen wallpapers
4. No WiFi

In the process of installing KiNgxKxlick `Clair 2.0 Sholes Port v0.1 downloaded from here http://www.4shared.com/file/149936056/39cdace/KiNgxKxlick-Clair-v01_signed.html?cau2=403tNull

ROM information available at http://db.androidspin.com/android_developer_display.asp?developerid=38

My Fastboot Info:

• Sapphire PVT 32B
• HBOOT-1.33.2009
• CPLD-10
• RADIO-2.22.19.26I
• May 6 2009

Process:

1. Downloaded the ROM
2. Wiped
3. ROM’d, see Installing Custom ROM’s

Pros:

1. Neat to see Eclair, 2.0
2. Exchange Email
3. Exchange Contacts
4. Exchange Calendar
5. Gmail
6. Email (Other)
7. New Facebook UI

Cons:

1. No GPS
2. No Mic (Incoming call answered but no one could hear me)
3. No sound
4. No Wifi
5. No Hero type contact photo integration
6. Auto-suggest force closes keyboard

Definitely one of the fastest ROM’s I have tried. Downloaded from http://www.megaupload.com/?d=H9MXQBK4

I went back to the ROM that shipped with the myTouch3G, took the 1.6 update, and used it for about a week. Never had so it was a good experience to see why I needed to go back to Hero.

MGHTYMAX was good but some of the logo’s and sounds annoyed me so I modded it a little. Had to learn how to sign my own ROM so that was also good.

Pros:

1. Exchange Email
2. Exchange Contacts
3. Exchange Calendar
4. Gmail
5. Email (Other)
6. Facebook
7. Facebook and Contact Photo Integration
8. Twitter
9. Flickr
10. Hero Clock w/ Weather
11. HTC Contacts Widget
12. Browser w/ Pinch
13. Browser w/ Mobile View On/Off Option
14. Picture Viewer w/ Pinch
15. Screen auto-rotate everywhere except Home screen
16. Good Speed (average around 20mb available)

Cons:

1. Could be faster
2. Marketplace 1.5 (I liked 1.6)
3. Missing some apps on install like Google Maps
4. Had to use the blurry fix file

Disclaimer: You could brick your phone and/or void your warranty. What you read here and then attempt to do is at your own risk. I am not responsible for what you do with your phone, PC, Mac, or whatever else you are messing around with. Proceed at your own risk.

1. You will need to be root’d to complete this task, see myTouch3G Rooting
2. Install a file manager on your phone, such as Linda or Astro, if you don’t already have one
3. Check to see if you are running SPL other than 1.33.2009, for help see Check Your Phones Hardware and SPL
4. Download the Engineering-SPL-HBOOT-1.33.2009-signed provided by Amon Ra from here http://rs602.rapidshare.com/files/267475617/update.Engineering-SPL-HBOOT-1.33.2009-signed.zip or 1.33.2005 from http://code.google.com/p/sapphire-port-dream/
5. Download the Radio update from here http://code.google.com/p/sapphire-port-dream/
6. Save the file to your computer
7. Plug your phone into your PC using a USB cable
8. Mount the phone to the PC
9. Copy the engineering SPL and Radio update that you downloaded to the SD card, no folder
10. Unplug the phone
11. Power down your phone
12. Press the Home and Power buttons to start up in Recovery Mode
13. Once in Recovery Mode select "Apply sdcard:choose zip" and click the action button
14. Select the applicable .zip file and click the action button
15. If you are going to update your Radio, now is the time to do it, if you try to do it before the SPL you are likely to brick your phone
16. Select "Apply sdcard:choose zip" and click the action button
17. Select the applicable Radio .zip file and click the action button
18. After the installation you are done, reboot the phone
19. It might hang for a while on a screen with a box and a yellow arrow coming out to point down at a phone before rebooting, this is normal
20. To verify the updated SPL power down, then restart in Fastboot Mode by pressing Back and Power for about 7 seconds
• Old Fastboot Info
• Sapphire PVT 32B…
• HBOOT-1.33.0006…
• CPLD-10
• RADIO-2.22.19.26I
• May 27 2009
• New Fastboot Info
• Sapphire PVT 32B… (no change)
• HBOOT-1.33.2009… (upgraded)
• CPLD-10 (no change)
• RADIO-2.22.19.26I (no change)
• May 6 2009 (older)