How to Downgrade iPhone 3GS 3.1 to 3.0 OS

[waynePH]

1. Start your iTunes 8.2 & Connect your iPhone 3GS to computer via USB

2. Switch of your iPhone and put it in DFU mode with following instructions

- Click the Home + Power On button for 10 seconds exactly

- Release the power button and continue to click on Home

3. Following message will be displayed in iTunes 8.2. Click on “OK”



4. Now Press ALT or Shift key on keyboard and click on Restore button on iTunes

5. Locate & Select the original iPhone 3GS 3.0 firmware



6. A Confirmation message will be displayer. Click on Restore



7. A Restore Process will start. At the end of restore process following error message “Unknown error occurred (1015)” will be displayed.



8. Do not panic with above error message. You just need to ignore above error message and click on OK button

9. Download iRecovery for Mac and iRecovery for Windows

10. Extract connect of iRecovery on Desktop



11. Go to terminal on Mac and on Command prompt on Windows and type following command

cd Desktop

iRecovery -s

12. Once you see a Message entering in Recovery Mode, Starting command prompt on screen type following command

Fsboot



13 Once the iPhone 3GS has been restarted, you see the “Emergency calls only” and You need to reactivate tour iPhone 3GS via iTunes

14. Either you can restore a backup or configure your iPhone 3GS as new phone and you are back to iPhone 3G 3.0 Firmware.

15. Now you can jailbreak your iPhone 3GS 3.0 with Purplera1n. Download Purplera1n from here & Check out how to jailbreak guide for iPhone 3GS 3.0.

[datu]

You know?, now i know, because of you, thank you!

[nath15]

nice sharing sir....

thanks.,.,.

[tavoonly]

May someone let me know how long does this iRecovery process last 'cause I am stuck in this step and the iPhone never restarts,

Here I show you the state.

[Exodusnz]

Originally Posted by tavoonly

May someone let me know how long does this iRecovery process last 'cause I am stuck in this step and the iPhone never restarts,

Here I show you the state.

Hi

Problem solved -

You need to type "fsboot" in small letters, not "Fsboot"

BR

[my toh]

I have iphone 3G, after i downgrade from OS3.1 to OS3.0, and also jailbreak and unlock , my phone is no signal!!!!!
anybody have solution?

[noi]

Originally Posted by my toh

I have iphone 3G, after i downgrade from OS3.1 to OS3.0, and also jailbreak and unlock , my phone is no signal!!!!!
anybody have solution?

because your baseband cannot downgrade, only your firmware will downgrade. Thats why you will end with No signal.

Lets wait for the Real UNLOCKING and JAILBREAK with Signal ..you can also use QuickPWN.

[alex_030385]

anybody tested with signal????????

[meeza_84]

thanks for nice sharing bro keep it up

[rasima]

thanks brother veri veri good

[7777]

is there anything wrong?need any help
thanks

C:\Documents and Settings\PC\Desktop>iRecovery -S
The system cannot execute the specified program.

[TRABEL]

Originally Posted by 7777

is there anything wrong?need any help
thanks

C:\Documents and Settings\PC\Desktop>iRecovery -S
The system cannot execute the specified program.

problem cuz of paces ...
move i recovery dir to root oc c:\
c:\irecovery

then do this command in cmd

[7777]

Originally Posted by TRABEL

problem cuz of paces ...
move i recovery dir to root oc c:\
c:\irecovery

then do this command in cmd

yes ,i do copy irecovery.exe and libusb0.dll to C driver directly,but same problem.Any other method to fix it
thanks

[BABAK NURI]

hi i have problem with active by itunes....

http://forum.gsmhosting.com/vbb/showthread.php?t=836605

please help me...

[gochke]

this is all bull ****! i am trying 4 days to downgrade my iPhone but i can't !

if you want to have really good post please write better instruction!!!