@All ...
Please take a look at this:
Preventing baseband update as a last-ditch effort [iPhone Dev Team]

This will get the machine out of the bootloop.
The instruction in that post uses fw 3.1.3 and let you keep the baseband at 05.11.07.

I've got another possible solution to this problem. (Worked for me)

Last week I was trying to figure out a way to disable the unlock temorarily so I could boot up the phone. Comex helped me create a special version of redsn0w that doesn't actually run the jailbreak but simply runs a delete command to get rid of /System/Library/LaunchDaemons/com.apple.CommCenter.plist. This way CommCenter doesn't start and therefore blacksn0w doesn't load with it. Once I booted up the phone successfully I immediately removed blacksn0w and installed RC2. Make sure you have a virgin (and running) CommCenter before installing RC2. What i mean by this is that it should tell you there is no SIM when you take your SIM out, and tell you it is an invalid SIM when you pop it back in. If CommCenter isn't running properly try this command:

launchctl load -w /System/Library/LaunchDaemons/com.apple.CommCenter.plist

Also make sure the old blacksn0w.dylib is deleted from /usr/lib before you install RC2.

Here is the modified redsn0w:

redsn0w-mac_0.9.4-modified.zip

Simply run through the normal jailbreak process and make sure to select "Install Cydia" - NOT "just boot tethered right now". No, this will not install Cydia again, since the code should only run the delete command. You will see the "downloading jailbreak data" screen and then it will reboot (hopefully) to the home screen! Good luck

Hi -

I fall under this scenario:

"Scenario 2: iphone booted up and has wifi.

- In this case, go ahead and use Cydia, add in source Cydia.pushfix.info and update your existing blacksn0w unlock to Blacksn0w RC2 Final."

Actually the iphone settings wifi is not detecting any networks but I installed the app WifiFoFum and I am able to connect. I'm hoping this RC2 Final update will fix the wifi problem as well as the reboot loop after resetting network settings. Can anyone confirm?

Question: If I installed blacksn0w from the blackra1n.app, can I just upgrade in Cydia to RC2 Final or do I still have to SSH and manually uninstall blacksn0w.dylib? If I need to manually uninstall, how do i "put back the original com.apple.CommCenter.plist". I mean where can I find this file? I'm assuming the .plist file goes in /usr/lib? Reason for my question is because I already added the source Cydia.pushfix.info but I didn't see an update notification for blacksn0w RC2 Final.

Thanks for your help!!!

Originally Posted by tee7788

Hi -

I fall under this scenario:

"Scenario 2: iphone booted up and has wifi.

- In this case, go ahead and use Cydia, add in source Cydia.pushfix.info and update your existing blacksn0w unlock to Blacksn0w RC2 Final."

Actually the iphone settings wifi is not detecting any networks but I installed the app WifiFoFum and I am able to connect. I'm hoping this RC2 Final update will fix the wifi problem as well as the reboot loop after resetting network settings. Can anyone confirm?

Question: If I installed blacksn0w from the blackra1n.app, can I just upgrade in Cydia to RC2 Final or do I still have to SSH and manually uninstall blacksn0w.dylib? If I need to manually uninstall, how do i "put back the original com.apple.CommCenter.plist". I mean where can I find this file? I'm assuming the .plist file goes in /usr/lib? Reason for my question is because I already added the source Cydia.pushfix.info but I didn't see an update notification for blacksn0w RC2 Final.

Thanks for your help!!!

I believe you can just install over the existing blacksn0w. Read here for more info: http://www.hackint0sh.org/f230/117709.htm

I've helped several people and every time i have the person manually remove all traces of blacksn0w first then turn off and turn on phone again. I do this just to be on the safe side.

To manual remove blacksnow, you need to go to /usr/lib and remove blacksn0w.dylib or rename it to something else like blacksn0w.dylib.original

To restore the original com.apple.CommCenter.plist, you can google for that file. It's available out there.

The com.apple.CommCenter.plist is locate in /System/Library/LaunchDaemons - backup that file first then copy the original one over it.

Note: before copying / erasing ... check the file permission attribute with ls -al and make sure those permission are the same after you copy it. I just want to make sure there are no loose ends.

Also check usr/libexec to make sure there isn't any blacksn0w* in there.

When you add cydia.pushfix.info, you will not see it as an update. Just do a search and you will see the RC Final package.

Thanks dtube!!! Good info!!!

I googled for the original com.apple.CommCenter.plist but can't seem to find it. The ones I see appear to be modified. Is there any way someone could upload this file for me? I have a 3GS with 3.1.2 fw and old bootrom.

This is what it looks like on a virgin 3GS running fw 3.0 just jailbroken. Nothing else installed on phone.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>HopefullyExitsFirst</key>
<true/>
<key>Label</key>
<string>com.apple.CommCenter</string>
<key>MachServices</key>
<dict>
<key>com.apple.commcenter</key>
<dict>
<key>ResetAtClose</key>
<true/>
</dict>
</dict>
<key>OnDemand</key>
<false/>
<key>ProgramArguments</key>
<array>
<string>/System/Library/PrivateFrameworks/CoreTelephony.framework/Support/CommCenter</string>
</array>
<key>ServiceIPC</key>
<false/>
</dict>
</plist>

Copy and save the text above to a file and name the file as com.apple.CommCenter.plist :-)

Thank you!!!

hi I have such problems with my iphone 3g
1) no wifi no matter how many times I reset network
2)blackra1n gets stuck in waiting to boot (tried every fix i could find)
3)installed redsn0w 9.4 so I have cydia but can't install because no wifi
4)I have 3.1.2 installed but everytime Itry to restore in DFU mode and get error 1013
PLEASE HELP!!!!

After I lost wifi connectivity I reset the network settings. After that my iPhone 3GS 3.1.2 didn't completely boot. It gets stuck in the famous loop.
I have resolved this in the past by recovering but I currently don't have a recent backup so I would prefer to just get it running again.

In the solution it says this: "shows the Apple logo, gives the Apple spinner, sits, then reboots". However my phone doesn't completely fit this description. It boots, shows the Apple logo for quite a while, than the screen briefly flashes white, then shuts down and reboots to do the same thing again and again. So it doesn't get to the part where the spinner shows. Should the method of depleting the battery still work?
Secondly should I see a battery icon somewhere in iTunes or on my iPhone? (iTunes doesn't recognize the iPhone)

Originally Posted by fsfikke

In the solution it says this: "shows the Apple logo, gives the Apple spinner, sits, then reboots". However my phone doesn't completely fit this description. It boots, shows the Apple logo for quite a while, than the screen briefly flashes white, then shuts down and reboots to do the same thing again and again. So it doesn't get to the part where the spinner shows. Should the method of depleting the battery still work?
Secondly should I see a battery icon somewhere in iTunes or on my iPhone? (iTunes doesn't recognize the iPhone)

There is another problem that is caused by Rock (which is an alternative to Cydia). Rock does not handle some upgrade scenarios properly. So if at some time since you last rebooted your iPhone you let Rock install updates this could be your problem. The symptoms are that the iPhone tries to bootup then suddenly shutting down very early in the boot process. This can be fixed.

Also, some springboard extensions can cause a hang at bootup. Things like SmartScreen etc. This can also be fixed.

See: [SOLUTION] iPhone shut off during boot / Stuck Apple Logo

for tools that can fix these problems.