Unlock iPhone 4 on iOS 5 Final Using Gevey SIM [How-to Guide]

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Before Updating to iOS 5:

DO NOT upgrade to iOS 5 using the stock firmware from Apple. Doing so will cause your iPhone 4 to lose its unlock by upgrading its unlockable baseband. You don't want that of course. Instead of using the stock iOS 5 firmware, we will be cooking our own iOS 5 custom firmware using the latest version of Redsn0w which we will be using to upgrade our iPhone 4 to in order to preserve your unlockable baseband. This way we can use Gevey SIM to unlock your device after the upgrade. Just follow this mini guide first:

Download the latest version of Redsn0w (0.9.9b5), which has a new feature that lets you create custom IPSWs. Currently available for Mac only but we'll make sure to update this post once the Windows version is made available. Download Redsn0w (0.9.9b5) for Mac here.
Launch Redsn0w and click "Extras" from the main menu and then select "Custom IPSW". Redsn0w will now create the custom IPSW for you. For iOS 5 IPSW download links, click here.
Once that's done, enter "Pwned DFU" mode through Redsn0w's "Extras" option.
After that restore to the custom firmware we've created earlier using iTunes 10.5 (download links here).
Now you can use Gevey SIM to unlock your device.

Steps on How to Unlock iPhone 4 on iOS 5 Final Using Gevey SIM:

1. Navigate to Settings » General » Network and turn OFF 3G. Make sure to keep Cellular Data and Data Roaming option ON. Also see to it that there is NO unofficial SIM present in your iPhone 4 SIM tray during this step.



2. Remove the stock SIM tray from your iPhone.



3. Place Gevey SIM interposer in Gevey SIM tray.




4. Now put the unofficial iPhone SIM on top of Gevey SIM interposer. As shown in the image below.




5. Turn OFF your iPhone 4 by holding down the Power button on top.



6. Place the Gevey SIM tray together with the Gevey interposer and unofficial SIM into your iPhone.



7. Now turn your device back ON.



8. You should now see the Gevey Welcome message, then just tap Accept to proceed.



9. Wait for a few seconds until you can see the 1-signal bar. Once you can see the 1-signal bar, open your Phone app and dial and call 112.



10. After about 2 seconds, promptly end the call by tapping the End button.



11. Navigate your way to Settings and enable Airplane Mode. Just let it be and wait till you see the "No SIM card installed" message. As soon as the message pops-up, tap the OK button to close the message and then turn Airplane Mode back to OFF.



12. By disabling Airplane Mode, you should see a "SIM Failure" notification. Just tap OK and that is it! Just wait until your iPhone unlocks itself.



13. After a few seconds, you should see that the signal bar on your iPhone is now full. Congratulations! You have just unlocked your iPhone 4 using Gevey SIM in iOS 5.0

 only on mac os.

Unlock iPhone 4/3GS On iOS 5 With Ultrasn0w 1.2.4 [Guide]




he iPhone Dev Team has released Ultrasn0w 1.2.4 to Unlock iPhone 4 and iPhone 3GS unlock on iOS 5. If you are relying on unlock on your device on iOS 4.x.x now you can update to iOS 5 and remain unlocked but remember Ultrasn0w 1.2.4 does not support any new basebands.





Ultrasn0w 1.2.4 Supported Basebands


01.59.00
04.26.08
05.11.07
05.12.01
05.13.04
06.15.00


If you have an iPhone 4 on baseband 1.59.00 you will have to build your own custom version of iOS 5 using the latest Redsn0w 0.9.9b5.


How To Unlock iPhone 4/3GS using Ultrasn0w 1.2.4


1- Jailbreak your device using Redsn0w 0.9.9b5

2- After jailbreaking your device open Cydia > Manage > Sources.





3- Hit Edit > Add and type this repo: http://repo666.ultrasn0w.com





4- After adding the repo, Search for Ultrasn0w and install it.





After a respring and a tethered boot, you are good to go.




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iPhone Dev Team Note About iPhone 3GS on the iPad baseband 06.15.00:


Note: there’s a special “trick” that iPhone3GS owners with baseband 06.15 need for iOS5. During the new setup screens you see when you start iOS5 for the first time, you’ll be asked about Location Services. Be sure to select “Disable Location Services” when asked! Later on in the setup, you’ll have the chance to turn on Location Services again when asked if you want to use “Find my iPhone”. It’s fine to turn it back on at that point, if that’s your desire (or you can always go in and enable it in Settings.app).


Also, some iPhone3GS users with the 06.15 baseband may have tried to install iOS5 using a stock IPSW (even though you should never ever try to use a stock IPSW if you’re an ultrasn0w unlocker). If you did try this, your baseband is probably in an inconsistent state, and you’ll need to reflash the 06.15 baseband again (using redsn0w). Be very careful if you use redsn0w to reflash the iPad baseband — don’t interrupt the process! And please avoid using stock IPSWs in the future Unlockers should never go near stock IPSWs.

What if you are on a higher baseband?

If Ultrasn0w 1.2.4 does not support your baseband, The solution now is the Gevey SIM.