wiki:radio_s_off

Version 26 (modified by anonymous, 12 years ago) (diff)

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Radio S-OFF

WORK IN PROGRESS - NOT DONE YET

And scotty2 did it again'''

Howto (Overview of the steps)

WARNING: You're backing up the radio partition, but be aware you are seriously messing with your phone here with a lot of potential for screwing things up. Do so at your own risk.

  1. Perm root your phone
  1. Make a backup of partition 7 of your phone, copy the image of partition 7 to your PC and modify it with a HEX-editor
  1. Use a custom kernel and the appropriate wp-this module to get rid of the write protection of the radio partitions
  1. Push the modified partition 7 image back to phone and copy it to the partition 7

At this point in time the @secu_flag is removed from your phone and your phone is S-OFF.

Optional steps - verify the S-OFF (Overview of the steps)

  1. start hboot, attach a serial console to it and start rtask c
  1. attach a serial console to the now running AT-command interpreter and run some AT-commands to verify the success

1. Perm root your phone

See http://forum.xda-developers.com/wiki/index.php?title=HTC_Vision#Rooting_the_G2 for instructions on how to perm-root.

2. Backup partition 7

Create a backup of your partition 7:

Get a adb-shell:

adb shell

In the shell

su
dd if=/dev/block/mmcblk0p7 of=/sdcard/mmcblk0p7-ori.img

Exit the shell and copy the image to your PC. (On your PC)

mkdir p7
cd p7 
adb pull /sdcard/mmcblk0p7-ori.img mmcblk0p7-ori.img

Make a copy of the image

cp mmcblk0p7-ori.img mmcblk0p7-new.img

Hex-edit the file

I use bless for the manual patches and dd for the bigger part. OS X users may consider using 0Xed

  1. The CID:

Edit mmcblk0p7-new.img and change the string T-MOB010 at position 0x200 (decimal offset 512) to the string 11111111

  1. the secu_flag:

Edit mmcblk0p7-new.img and change the byte 0x01 at 0xA00 (decimal offset 2560) to 0x00

  1. Set the area 0x80000 to 0x82ffff (decimal offset: 524288 to 8585215) to all zero. So get rid of your hex editor, and lets just use dd on your computer.
dd if=/dev/zero of=mmcblk0p7-new.img seek=524288 bs=1 count=196608
dd if=mmcblk0p7-ori.img of=mmcblk0p7-new.img bs=1 seek=720896 skip=720896
  1. Back to the hex editor. Edit mmcblk0p7-new.img and set the 4 bytes at 0x80000 to 78 56 F3 C9 and set the 4 bytes at 0x807fc to 49 53 F4 7D

That's it. Now we need to install the modified partition 7 to the phone.

3. Use custom kernel and module to get rid of the write protection

You will have to install a custom kernel that disables the kernel protection for the radio partition and a wp-this module for this kernel that drops the write protection of the emmc-memory chip.

The boot.img that contains the kernel can be found here: http://www.thinkthinkdo.com/boot-new.img

The wp-this here http://www.thinkthinkdo.com/wpthis-cyanogen.ko

Install the custom kernel using fastboot.

First boot your G2 into fastboot (press Power Button and the trackpad Button until the screen with the surfing androids appear and it says FASTBOOT in red).

Get fastboot from <the internet>

(On your PC)

fastboot erase boot
fastboot flash boot boot-new.img

Reboot the phone into normal mode and copy the new image to the G2

4. Copy the modified partition 7 back to the phone

(On the PC)

adb push mmcblk0p7-new.img /sdcard/

Get a shell:

adb shell

In the shell:

insmod /sdcard/wpthis-cyanogen.ko
dd if=/sdcard/mmcblk0p7-new.img of=/dev/block/mmcblk0p7
sync

Wait a minute to make sure that the changes stick.

Reboot the phone.

If all went well, you did it! Here are some optional steps to make sure you did it right:

OPTIONAL STEPS

5 start rtask c in hboot

Plug your phone into your computer, and in a terminal, type the following:

On your computer:

sudo modprobe -r usbserial
sudo modprobe usbserial vendor=0x0BB4 product=0x0C94
sudo screen /dev/ttyUSB0
rtask c

This will terminate your console session. Attach the serial to the new USB-device

6 Verify the success using the AT-command interpreter

On your computer:

sudo modprobe -r usbserial
sudo modprobe usbserial vendor=0x05c6 product=0x9002
sudo screen /dev/ttyUSB2

In the following code there is mixed commands and answers. You only type the commands the start with AT.

ATE1
ATV1
AT@CID?
@CID: 11111111

OK
AT@SIMLOCK?AA
@secu_flag: 0

AT@SIMLOCK?40
@SIMLOCK: 00

OK

AT$QCPWRDN

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