DO ALL THIS WITH YOUR THIRD PARTY SIM INSERTED ALSO YOU WILL NEED WIFI IN ORDER TO INSTALL SBSettings and Yellowsn0w

1. Connect your phone to Mac/PC
2. Launch Itunes
3. Put iPhone into DFU Mode

Get the iPhone into DFU mode: When in this mode the iPhone screen is black.
3.1. Connect the iPhone and your Mac/PC
3.2. Shut down iTunes
3.3. Hold Power/Sleep until the red slider shows up, slide to shut the iPhone down. If this aint work hold Power/Sleep and Home until the iPhone shuts down.
3.3.1. Hold Start/Sleep and Home for 10 seconds (I count like 100, 200, 300, ..)
3.4. Let go of Start/Sleep but keep holding Home until...
3.5. ... iTunes starts up and finds an iPhone in restore/recovery mode. The iPhone screen is black.

4. Command + Restore to stock apple 2.2 ipsw (mac). Shift + Restore to stock apple 2.2 ipsw (windows)
5. Disconnect iPhone from Mac/PC before it reboots after the software restore
6. Close iTunes and reconnect iPhone
7. Run Quickpwn and let it do its magic. QuickPwn for mac and windows can be downloaded from

Code:

QuickPwn 2.2 for Mac

Code:

QuickPwn 2.2 for Windows

8. Disconnect iPhone from your Mac/PC.
9. After jailbreaking your iPhone with quickpwn go to Settings --> General --> About and verify that the Carrier field displays (null)(null). If theres other thing than (null)(null) in the carrier field your iPhone activated itself to your locking carrier. Start all over again.
10. Launch cydia. after the first run restart ignore the upgrade essential prompt and install SBSettings
11. Go to Manage-->Sources and add the yellowsn0w source

Code:

http://apt9.yellowsn0w.com

and install yellowsn0w 0.9.6
12. Press home button and return to your Home Screen
13. Go to Settings --> General --> Reset --> Reset Network Settings. This will automatically reboot your iPhone. If not proceed as follows.
13.1. Slide your finger over the status bar when the SBSettings panel pops up tap over power and tap reboot in the following prompt.
14. Wait 5 - 10 seconds from when you see the slide to unlock screen after reboot.

have signal already??? no??? ... then keep going.

15. Turn on airplane mode for 10 - 20 seconds
16. Turn off airplane mode
17 Be Happy!!!


Many thanks to dev team for this breaktrough and all the effort made on bringing yellowsn0w to life. Happy New Year.

Credits: Get the iPhone into DFU mode info taken from volkpost post.

Update: added download link to quickpwn for windows. Instructions applies for windows as well.

thanks, this is the easiest so for that i have tried.

GREAT!!!

The first restart after network reset didnt work though, using the sbsettings reboot made the signal appear.

Glad to know it worked. Thanks for the rep up. Peace.

With me,its all working good,no need to do anything,but it keeps losing the signal for 30 secs and comes back

Ashkan, Try to go to the terminal and do the -s and -r untill you get no carrier, then do Airplane mode, then anable.

Dude, i can tell you its anoying as hell getting that thing to always reboot its signal, and phone.

Mainly it was because i had an already iTunes/ATT activated phone. But when i let Quickpwn activate it, i got nothing, no signal and carrier. Yellowsn0w did the trick for me.

so far i am satisfied.

Exactly where do you put in the source? Cydia or Installer? Because Installer's saying the link is bad.

In cydia dude. Look at step 10.

i did all that ..but still can't make outgoing calls..!!!

Originally Posted by eliomar

Mainly it was because i had an already iTunes/ATT activated phone. But when i let Quickpwn activate it, i got nothing, no signal and carrier. Yellowsn0w did the trick for me.

I´m using Quickpwn for Windows (as i still get the dfu-mode error on my mac and i´m afraid of the kext-patch) but i´m wondering how you can jailbreak the iphone without activating it?
i´m using an AT&T iphone and would like to use it with o2 (germany).
Thanks for any help!