Originally Posted by devolio

As I don't have a european device, I can't say for sure, but this thread should get you started on the process :

HOW TO: downgrade, root and upgrade ANY G1/Dream (even Continental European) - xda-developers

I know there's also threads on xda-developers that has the rollbacks for the UK devices.

Originally Posted by devolio

Root allows you to modify just about everything, flash new images,

change your boot image, change themes, run ARM debian, and tons more.

This guide goes through installing/downgrading to RC29, getting root, flashing the new recovery.img / test keys, changing the boot loader, and installing JesusFreke's modified RC33 builds.

If you're unsure about why you would want root, or aren't comfortable with flashing or poking around on your device, do not do this.

Update (3/10/09): Switched from RC30 to RC33 instructions, and clarified a few points.

Sources

JesusFreke's modified updates
Registering without a sim or data plan
Modded recovery and boot images
Dream SPLs
RC30 to JFv1.31

more versions Available at NoOneHereYet's WebPage
Cupcake Downloads

And all of the great people over at xda-developers and freenode/#android who make it all happen.
Let's get started.

Also, please note that this will wipe out everything - all of your settings and apps - twice. By installing the RC29 nbh, you lose everything, and likewise moving to RC33 Or Cupcake_1.5.

There's 4 main files you're going to need:

In the following zip file : DREAIMG-RC29.zip is the DREAIMG.nbh you will need ...
Extract it from the zip ... and DO NOT RENAME IT !!!

DREAIMG.nbh
This is the NBH file needed to roll back to RC29 <<< this restores the security hole which allows root access..

recovery_testkeys.img The modified recovery image/test keys.


EngBootloader_v2_NoSigCheck.zip
The engineering bootloader. An update.zip. It's recommended that you
read more about them here before choosing this one.

JFv1.42_RC33
JesusFreke's (latest, at time of writing) modified RC33 update.zip. US version:

... or you might use this one if you Want 1.5 cupcake like the MAGIC
=======================================
This is the MAGIC 1.5 Haykuro Build ...
MAGIC 1.5 Haykuro Build ver 5.0.2G
You will find the MAGIC 1.5 Haykuro Build ver 5.0.2G at the above link...
Link by AF: member noonehereyet
this edit addition by AF Member: justjimjpc
============================================

RC33 Radio update The radio update to apply when moving to RC33.

NOTE:
If you are doing any version based on Cupcake 1.5 then use the following for the Radios Flash file:
http://www.getyourdroidon.com/root/ota-radio-2_22_19_26I.zip

<<<=============================================== =>>>
Once you have all of the files, you're ready to go.


Once again, if you're unsure about why you would want root, or aren't comfortable with flashing or poking around on your device, do not do this.

It's definitely recommended that your phone's battery life remaining be full or near full when you start this, as it can take awhile depending on how quickly you do the steps.


Step 1)

- Format the Micro SD Card to FAT32.
- Copy the DREAIMG.nbh file to the Micro SD Card. (NOT A ZIP FILE)
- With the phone off, hold camera and press power to boot into the bootloader.
- Once the bootloader is loaded, press power to install.
- Press the trackball to continue and press talk+menu+power to reboot.


Step 2)

BEFORE RUNNING THIS STEP: get the APPS TELNET & TERMINAL From the AppMarket

- Copy recovery_testkeys.img onto the Micro SD Card.
- Turn the phone on (if not already)
- Type enter telnetd enter (this starts the server command_
- now go to you apps and start the App Telnet
use the telnet application from the market and connect to localhost
OR
- Telnet into the phone with telnet (telnet ipaddress)

- Run the following as root (from within the Telnet app )

And you've created su, a way to switch to the root user easily. Now we need to add the modified recovery test keys. Run the following in telnet again (or as root).

Now that's finished.

Personally, I prefer to go with the Engineering bootloader, but you can

choose whichever you'd like.

Step 3)

- Rename whichever bootloader package you're going to use to update.zip
- Copy it onto the Micro SD Card.
- Turn off the phone (if not already,)
- Hold home+power to boot into recovery mode
- Alt+L to see the text
- Alt+S to install the bootloader
- When it's done, reboot

And now you've got the bootloader. Last but not least, if you'd like, you can install JesusFreke's RC33 builds that add a lot of extra goodness.

Step 4)

Note: It's recommended elsewhere that you wipe your data (Alt+W in Recovery Mode) before applying this update. Although I don't do this myself, doing so never hurts.

- Rename to update.zip
- Copy it onto the Micro SD Card.
- Turn off the phone (if not already,)
- Hold home+power to boot into recovery mode
- Alt+W to wipe the data, as noted above, if you so choose
.............. note Alt+W will remove all your downloaded apps ....
- Alt+L to see the text
- Alt+S to install the update
- When it's done, reboot (Home & Backkey)... (this is after you get the Recovery Menu the second time)

Step 5)

- Repeat the same process as in Step 4 with the RC33 or Cupcake 1.5 Radio update. This update will restart your phone a few times and display the 'flashing rom' graphic, be patient, as it can take some time. And now you're done.

Easy as pie.

Originally Posted by randel77

First, I gotta give Devolio a million thanks for helping me to get this working on my phone. I would like to offer a little help to those that might get stuck/confused at the same place(s) that I did.

Step 2)

- Copy recovery_testkeys.img onto the Micro SD Card.
- Turn the phone on (if not already)
- Type enter telnetd enter to start telnet
--- Note some people have found that pressing enter twice then Type telnetd follow by pressing the enter key ...
- Telnet into the phone with telnet (telnet ipaddress)
- Run the following as root (in telnet)

- Type enter telnetd enter to start telnet
(your contacts will come up it, which is ok. hit the enter key then type telnetd and the enter key again).

- Telnet into the phone with telnet (telnet ipaddress)
(at this point you need to download "telnet" from the market. Run the app and hit the "connect to server" button. a bunch of funny symbols will pop along the top of the screen the last one is #

- Run the following as root (in telnet)
(simply type the code exactly like you see it, in the telnet app)


For those running windows 7 (as I am): if the JesusFreke's RC30 build does not install, rename the JesusFreke's RC30 build to update instead of update.zip

As of writing this the latest JesusFreke's RC30 build is JFv1.41 (multi-touch browser).

Heres where to get it Updated 3-3-09 - JFv1.43 for UK RC9 firmware! - xda-developers

Originally Posted by exmortis

It's all going wrong on step 2

cannot create recovery.img read_only file system

what iam doing

Originally Posted by exmortis

i don't know what iam doing wrong , get to step 2 all ok until i put in the recovery image and then it goes wrong , it's on the sd card tried 2 different ones formatted to fat 32 or fat it just comes back with read only file or can't find it...... through telnet on the phone , iam puting in telnetd and then opening the telnet app on the phone gives me load of charaters ending in ## then i start , ive downgraded the phone from rc9 to rc7 with putting the file NEEDED then deleteing it off the sdcard so the sd is clean with every step ???

Originally Posted by exmortis

i don't know what iam doing wrong , get to step 2 all ok until i put in the recovery image and then it goes wrong , it's on the sd card tried 2 different ones formatted to fat 32 or fat it just comes back with read only file or can't find it...... through telnet on the phone , iam puting in telnetd and then opening the telnet app on the phone gives me load of charaters ending in ## then i start , ive downgraded the phone from rc9 to rc7 with putting the file NEEDED then deleteing it off the sdcard so the sd is clean with every step ???

Originally Posted by exmortis

Thanks all for the help!!
Rooted the phone OK through a UTube video i watched using telnet and terminal emulator

applied the updates and installed the HTC Magic platform for the G1 look great and seems great will keep posted on outcomes

TIP TOP HTC MAGIC

Originally Posted by walkerx

Well I managed to root mine following the instructions here, but i have a question

when rebooting to do the firmware update and press alt+l to get the list it displayed the following

Android system recovery utility using test keys
E:can't open /cache/recovery/command

then listed all the alt options, so I done alt+w then alt+s and it went through the update process and said complete

so rebooted and checked revision which now shows as

Android Dev Phone 1
1.5
dream_devphone_userdebug 1.5

and checking in the apps got loads of stuff I never had before so looks like it worked a treat, but is that error at the beginning an issue or should i just ignore

also do i have to leave all the install files on in the root location

whoops, missed of step 5 so just doing that at the moment

installed JFv1.50_ADP1.5 and the cupcake radio update (what is the radio bit for ?)

thanks

Originally Posted by PoweredByLE5

I was thinking of rooting my phone so I can get the 1.6 update. But I have a question. Since rooting requires erasing EVERYTHING, does that mean any paid apps I have I will have to rebuy?

Originally Posted by manolo111

hi all. few days ago, i bought a g1 from shanghai-china.build number is:
killa-user 1.5 crb21 147201 ota-rel-keys,lelease keys
is there any possibility to root it? and how?
thanx

Originally Posted by justjimjpc

Originally Posted by Hellsticket

will it change the software? will i still be able to use write in chinese????