Downgrade 3G Baseband from 2.30 to 2.28

[tomo3014]

Followed the TattooJack instructions list and im stuck on the step:

After you've gotten Mobile Terminal installed, open it up and follow these instructions carefully (capitalization counts!) to check what version of bootloader you have.

(All case sensitive and you may need to use cd .. to change to the right directory you've uploaded the files to)

1. Type in: su
2. Type in the password: alpine
3. Type in: chmod 755 BBUpdaterExtreme
4. Type in: launchctl unload /System/Library/LaunchDaemons/com.apple.CommCenter.plist
5. Type in: ./BBUpdaterExtreme queryversion

I am in /var root# and it tells me when I type "chmod 755 BBUpdaterExtreme" I get an error saying chmod cannot access 'BBUpdaterExtreme' no such file or directory.

Not sure how to fix, if anyone can tell me where I made my mistake I would appreciate it

hey i had the same problem.

before you do number 3, try cd /var/root
and try 3,4,5
it worked for me.

t

[shahir29]

when i go to phasebandowngrader is says permission denied. so i used winscp to ssh in an change octel file to 0755 but i couldnt find octel i only found this:

any help?

[RHMobileJake]

06.02 Thanks for the help though worked like a charm once I tried it your way

[JStraitiff]

^The bootloader itself is software....and depending on the version can be downgraded.

(Not to say the phone will work afterwards, depends)

like i said... depends on hardware

[StealthBravo]

nice write up

[ggab]

So I checked my bootloader version and it said: "Boot Loader Version: ICE2_BOOT_05.08_G2M3S2" so I figured I was good to go with that 5.08 in there.

I run the BBUpdaterExtreme per http://www.modmyi.com/forums/general...ml#post3877511 and after it runs through everything at the end it says:
!!! Exception at :0:
- BBUReturnError(1)/2:Unsupported memory class CodeClass for EEP transfer. Are you sure ICE2_02.28.00.eep is an EEP file?
Re-enabling sleep....OK

I rebooted and I'm still at 2.30 baseband. According to "Tom" at On the iPhone: 5.8 Exploit I'm screwed. He said "When you get the .eep error: Are you sure this is an eep file? Or something similar, that means your bootloader cannot be exploited, i.e. you're screwed for now."

I don't get why I can't do this if I have the 5.08 bootloader? Anyone have any insight on that?


Just saw that someone else at that same site had success with the same version of the bootloader that I have....
Imanzano said...

It worked with my 3g iphone boot loader ICE2_BOOT_05.08_G2M3S2
firmware 2.2.1 baseband 02.30.

Thank you George, and thank you Tom for your post, it helped me very much.

Good luck



Doesn't make me very happy! LOL

In case anyone cares I used method 2 that involves using the bspatcher and it worked.

[KoolMan0]

from geohots blog


...

no offense jag0

Got it to work
Went from 02.30.03 to 02.28.00
Thanks


For those of you that are still having problems This Should be more simple
.................................................. .................................................. .........
Download:

• RapidShare: Easy Filehosting
• GBAtemp.net :: Downloads :: ROM patchers & header info :: bspatch
• http://lpahome.com/geohot/downgrade.patch

1. Make a folder on your desktop
2. Extract All to the same folder (All Three Files)
3. In the Folder there should be a Shortcut file called "Prompt" open it
4. Now type in:
   bspatch ICE2_02.28.00.fls patchedbaseband.fls downgrade.patch
5. Now Make a New Folder in that Directory Call it "new"
6. Three Files need to be copied To the "new" folder
   • patchedbaseband.fls
   • ICE2_02.28.00.eep
   • BBUpdaterExtreme
7. Rename patchedbaseband.fls to ICE2_02.28.00.fls
8. SSH into your iPhone
9. Copy the Three files (patchedbaseband.fls, ICE2_02.28.00.eep, BBUpdaterExtreme) to /private/var/root
10. Now go to MobileTerminal (on your iphone, This app can be Downloaded from Cydia or installer)
11. Type in the Following Commands *****Case Matters*****
    1. Type in: su
    2. Type in the password: alpine
    3. Type in: cd /var/root
    4. Type in: chmod 755 BBUpdaterExtreme
    5. Type in: launchctl unload /System/Library/LaunchDaemons/com.apple.CommCenter.plist
    6. Type in: ./BBUpdaterExtreme queryversion
12. NOTE:
    • if you see a 5.8 continue
    • if you see a 5.9 STOP this will not work for you Sorry
13. Continue if 5.8
    1. Type in: su
    2. Type in the password: alpine
    3. Type in: cd /var/root
    4. Type in: chmod 755 BBUpdaterExtreme
    5. Type in: launchctl unload /System/Library/LaunchDaemons/com.apple.CommCenter.plist
    6. Type in: Type in: ./BBUpdaterExtreme update -f ICE2_02.28.00.fls -e ICE2_02.28.00.eep
    7. Reboot Device
14. Once the iPhone has restarted go to Settings> General> About> At the bottom should say 02.28.00 (then you jump up and down in JOY)
15. Last But not Least Unlock
    

****Remember "Don't eat yellowsn0w!****



P.S.
Here are the three Files you will be creating
so just copy these to you iphone (continue from Step 8 or 9)
Three Files inside this RAR

Good Luck and thank Everyone who made this possible
Sorry I will Go back and Press the Thanks Button tattoojack
lol
Thanks


Edit Here are some Pics

[reneki]

NICE, it actually worked. But the only good that this will do is allow those who currently cannot use their phones because they unknowingly upgraded the firmware right? I mean doing this won't prevent you from having to do it again with 3.0 comes out right?

so if your with a carrier already, this is completely useless? if not how so(curious)?

[CaCHooKa Man]

darn.. i have 5.9

[wujek21]

hi i done everything like is in post above and again nothing. i copy files into /private/var/root. i turn my mobile terminal on and i Type in: cd /var/root
Type in: chmod 755 BBUpdaterExtreme
Type in: launchctl unload /System/Library/LaunchDaemons/com.apple.CommCenter.plist
Type in: ./BBUpdaterExtreme queryversion
and again my iphone show me message there is no such filr or directory . i try many things and nothing.

[reneki]

hi i done everything like is in post above and again nothing. i copy files into /private/var/root. i turn my mobile terminal on and i Type in: cd /var/root
Type in: chmod 755 BBUpdaterExtreme
Type in: launchctl unload /System/Library/LaunchDaemons/com.apple.CommCenter.plist
Type in: ./BBUpdaterExtreme queryversion
and again my iphone show me message there is no such filr or directory . i try many things and nothing.

/private/var/root and /var/root are two different places...copy files into var/root and try again.

[replay187]

how can I check my bootloader??

[DaBossA]

I still cant get this to work...I think the part Im doing wrong is with MobileTerminal...Can anybody explain that process clearer? Thanks...

hi i done everything like is in post above and again nothing. i copy files into /private/var/root. i turn my mobile terminal on and i Type in: cd /var/root
Type in: chmod 755 BBUpdaterExtreme
Type in: launchctl unload /System/Library/LaunchDaemons/com.apple.CommCenter.plist
Type in: ./BBUpdaterExtreme queryversion
and again my iphone show me message there is no such filr or directory . i try many things and nothing.

Yea I keep getting this same thing...

[i pimping]

i havent got var/root ive only got private/var/root

[webacct]

method:2 worked like a charm for me
I downgraded the baseband, installed yellowsn0w and unlocked my 3G phone previously jailbroken with 2.2.1 firmware
btw /var/root and /private/var/root are the same folders
/var is a symbolic link to /private
Thanks to him121213 and tattoo jack

[i pimping]

i cant get past cd/var/root in terminal it says no such file or directory

[oldcoyoteinc]

great work thanks for help

[Dblock0405]

i got a 6.02 bootloader. any clue?

im stuck i guess ima try the rest of the tut and reply

yea i did it again and i got

Boot Loader Version: ICE2_BOOT_06.02_G2M3S2

[thetoothfairy]

Found this site on the internet...... thought it was cool to read about this topic and MMI

Downgrade your iPhone 3G baseband from 2.30 to 2.28!

[Rob_Quads]

I have read that there are 3 bootloaders depending on when your phone was made. Can you just clarify, does this mean (at the moment) its a fixed value that does not get changed with firmware updates etc i.e. if you 5.09 you have always had and always will (at the mo) have 5.09