November 30, 2023

How to Check Your iPhone Bootloader Version (Windows)

Posted April 15, 2009 at 2:14pm by iClarified · 385798 views
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These are instructions on how to find your iPhone Bootloader version using BBUpdaterExtreme and Windows. You can use these instructions to determine if an unlock is possible on an accidentally upgraded iPhone 3G. Currently only iPhones with bootloader 5.08 will be able to downgrade their baseband for the unlock.

Before you begin please have MobileTerminal and OpenSSH installed from Cydia. You can find MobileTerminal in the Terminal Support section of Cydia. For instructions on how to install an application from Cydia you can use this tutorial.

You will also need WinSCP installed you can find it here

Step One
Download BBUpdaterExtreme from here and save it to your desktop.

Step Two
Launch the WinSCP application from your Start Menu programs.How to Check Your iPhone Bootloader Version (Windows)

Step Three
Make sure you iPhone is connected to the same wireless network as your computer and determine its IP Address using these instructions.

Step Four
WinSCP will ask you to input your login information. Enter the IP Address you just retrieved in Step Three as the Host Name, root as the username and alpine as the password. Click the Login button to continue.
How to Check Your iPhone Bootloader Version (Windows)

If prompted to add the host key to the cache click the Yes button.
How to Check Your iPhone Bootloader Version (Windows)

Step Five
WinSCP will now display two file trees. The one on the left is your local computer and the one on the right is your iPhone.
How to Check Your iPhone Bootloader Version (Windows)

Navigate to your desktop using the left file tree and navigate to the /bin directory using the right file tree.
How to Check Your iPhone Bootloader Version (Windows)

Step Six
Drag the BBUpdateExtreme file from the left panel to the right panel.
How to Check Your iPhone Bootloader Version (Windows)

Step Seven
Select Open Terminal from the Commands menu.
How to Check Your iPhone Bootloader Version (Windows)

Step Eight
Input the following commands into the Terminal window and click the Execute button after each.

cd /bin
How to Check Your iPhone Bootloader Version (Windows)

chmod 755 BBUpdaterExtreme
How to Check Your iPhone Bootloader Version (Windows)

launchctl unload /System/Library/LaunchDaemons/
How to Check Your iPhone Bootloader Version (Windows)

How to Check Your iPhone Bootloader Version (Windows)

Step Nine
Your iPhone will now loose its network connections. Launch Mobile Terminal from the iPhone SpringBoard.
How to Check Your iPhone Bootloader Version (Windows)

Step Ten
Type su into the terminal window. When asked for a password input alpine as the password.
How to Check Your iPhone Bootloader Version (Windows) How to Check Your iPhone Bootloader Version (Windows)

Step Eleven
Now input BBUpdaterExtreme queryversion to get the bootloader version of your iPhone. It will look something like Boot Loader Version: ICE2_BOOT_05.08_G2M3S2
How to Check Your iPhone Bootloader Version (Windows) How to Check Your iPhone Bootloader Version (Windows)

NOTES: You will need to restart your iPhone to regain network connectivity. You could also type launchctl load /System/Library/LaunchDaemons/ into the terminal window.

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Nyco - March 15, 2011 at 4:13am
Hi. A friend bought an iPhone4 on the street and after a few days it left without signal, probably was stolen. I need to change the imei but after I install Cydia using redsn0w the internet doesn't work. If I restore it it works. I already tried with Configuration Utility and restore. What to do to get the internet working? 10ks. Great work.
Legend - November 6, 2009 at 4:32pm
Best way to check your baseband n boot loader is install fuzzyband through cydia n it will check it for of luck
aaaaaaaa - August 27, 2009 at 11:05am
when i do step 4 and login to winscp it says "acces denied" what should id o ? whats wrong please help me
Malcolm - June 6, 2009 at 8:54am
Download fuzzyband app from cydia. It does all the steps for you and also lets you know if your baseband is not supported.
sublime740 - June 4, 2009 at 11:17am
I am unable to connect to my Iphone using WinSCP. I get a message repeatedly that access is denied. Is it possible that the username and password on the phone is not "root" and "alpine"? I am not the original owner of the phone but was curious why I can't remote access into the phone. I was able to do this with several other Iphones so I know it's not my laptop or router causing the problem. Any suggestions/ideas??
mubeen - June 5, 2009 at 5:41pm
i ve the same prob mate i entered the same username n password as bove it doesnt login neways if u do find a way to login lemme knwo as w7ell ill b waitin
mlb_tun - May 29, 2009 at 5:25am
i am stuck on step eleve!! when i input the comand bbupdaterextreme queryversion i get UNKNOWN COMMAND error...any ideas???i want 2 unlock my iphone cause i am sick of this turbo sim
Malcolm - May 30, 2009 at 2:04pm
Install fuzzyband app from cydia under system apps, it's a easy way to downgrade. If your bootloader is higher, it will let you know exectly what it is. Unfortunately mine is 06.02 so waiting on dev team for solution.
Kay Anderson
Kay Anderson - May 27, 2009 at 11:42pm
Boot Loader Version: None or Unknown what do i do?????? im so confused....
Anytime - May 24, 2009 at 7:32pm
My version is 5.09.... its only a 0.01 diference... I'll keep on waiting.
omid - May 22, 2009 at 5:19am
hi guys, i get error massage in step 8 , cd/bin any idea ,? i have to mention that modem firmware of my iphone is 02.30.03, is it the reason i cant complete the steps? Thank u.
Pedro - March 15, 2012 at 5:46pm
regarding the 11th photo NOT FUNNY. indigenous folks in cpuxneeted places maybe, but NOT FUNNY. Why is it funny for minority folks in traditional clothing to be using modern technology?? Would love to have that explained to me.
Kelly - May 18, 2009 at 6:49am
I didn't have wifi so I couldn't use WinScp.Heres what did. I put the file in the directory using ifunbox then I changed the permissions in mobileTerminal did everything else in there and it worked.Sadly mines 5.09. Thanks for the guide.
Dickieees - May 20, 2009 at 5:52pm
hey, you said that you have changed the permission in Terminal. How did you managed that? My Iphone is denying BBUpdaterExtreme
Kelly - May 28, 2009 at 9:11pm
You can use chmod in MobileTerminal to change the permissions of the directory the file is in or use something like Boss Prefs(not recommended) search for the command but remember to change it back when you are done.
subba - May 9, 2009 at 1:43pm
thanks man n glad to have the unlock back
mingjian - May 7, 2009 at 12:59am
My BootLoader version is 5.09. (not 5.9) can i unlock it now? Help me please
dustmaker - May 11, 2009 at 1:06pm
Unfortunately, I've spent over 5 hours going to every forum and website to find a solution, but sadly there is no hope for 5.09 holders at this moment. You can only downgrade your Modem Firmware if you have boot loader 5.08 and no people there is NO way to downgrade your boot loader from 5.09 or 6.02 to 5.08. I'm hoping that the iPhone Dev Team will work on this issue and try to fix it as soon as possible, because we'll not be able to use our iphones otherwise.
mingjian - May 15, 2009 at 11:10am
wow. thanks a lot for your share. whatever i really thanks for your reply. really can you remind me if there is solution if you found? thanks fri.
Rene - May 6, 2009 at 4:33pm
I used this manual to search the version of the bootloader ( 5.09). Now my iphone resets automaticly every 3 or 4 minutes. I did already a restore but it stays with this problem. Is there somebody who can help me please
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