How to Update iPhone 3gS & iPhone 4 to iOS 5.1.1 Preserving your Baseband for Unlock

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Jailbreaking Tool used here is Redsn0w 0.9.11b4. We will first use it to Put our iPhone 3gS or iPhone 4 in Pwned DFU mode as shown in the video. Then we will use iTunes to upload a CUSTOM iOS 5.1.1 (NO Baseband firmware) onto our iDevices. This will NOT Change our baseband. So that we are able to Unlock our iPhone 3gS by installing Ultrasn0w from Cydia. And in case of iPhone 4 we will use Gevey Ultra sim to Unlock.
Remember that this Redsn0w will Tether Jailbreak your iDevice. In order to make it Untether, you will need to install 'Rocky Racoon 5.1.1 Untether' from Cydia. Just follow simple steps shown and demoed in the video. You will successfully complete everything you need.

IMPORTANT: iPhone 3gS Users MUST choose to check mark 'install iPad baseband' option and Cydia option. This will re-flash your iphone 3gS baseband and then you will be able to unlock by Ultrasn0w from Cydia. But in order to Unlock you will need to add this source in Cydia http://repo.iparelhos.com Then install 'Ultrasn0w 5.1.1 fixer'. Then search for 'Ultrasn0w' normally in Cydia. Install it. Reboot . You should be Unlocked successfully.

Download Redsn0w for Windows: http://uploading.com/files/faaa43f7/redsn0w_win_0.9.11b4.zip/
Download Redsn0w for Mac: http://uploading.com/files/94ae418a/redsn0w_mac_0.9.11b4.zip/

Download Custom iOS 5.1.1 for iPhone 3gS http://uploading.com/files/aca6c63b/NO_BB_iPhone2%252C1_5.1.1_9B206_Restore.i...
Download Custom iOS 5.1.1 for iPhone 4 http://uploading.com/files/9b5bc98d/NO_BB_iPhone3%252C1_5.1.1_9B206_Restore.i...
Download all/any (in this case iOS 5.1.1) Firmware for your iPhone http://www.iclarified.com/entry/index.php?enid=750

HELPFUL TIPS:
a) You must have Winrar installed on your computer. If not then google it or download it from here http://www.win-rar.com/download.html This will help you in Unzipping redsnow.
b) How to remove errors while updating to iOS 5 http://twitpic.com/9rjcgy
c) If your Redsn0w crashes , make sure to close iTunes. Also , run this redsn0w in Adminstrative mode. Right click on it and choose 'Run as Administrator'. You can also right click on Redsno0w and go to Properties then Compatibility mode. Change compatibility mode to windows 98/Me. And choose ' Run as administrator' from below. Then run Redsn0w.
d) If you have an iPhone 3gS and Redsn0w crashes at point when you choose Cydia and install iPad baseband option, then do it one by one. First time choose Cydia option and follow up with the jailbreak process. Then run Redsn0w again and now choose iPad baseband option.
e) Once you open Cydia, let it load its sources completely. If after 10 minutes it is still loading, then close redsnow and open it again. Now again let it load its sources again. Go to 'Changes' tab in Cydia and Upgrade any sources that needs to be upgraded. Then simply search for 'Rocky Racoon 5.1.1 Untether' to make your Jailbreak Untether.
f) How To Backup Your Jailbreak Apps And Tweaks From Cydia http://tinyurl.com/899nlzu
g) How to backup Data through iTunes http://osxdaily.com/2010/06/22/how-to-backup-your-iphone/
h) You can also make these No Baseband Firmwares (Custom iOS 5.1.1) from Redsn0w given in this video. Just Launch Redsn0w 0.9.11b4. GO to 'Extras' option. Then go to 'Select IPSW'. Choose Official iOS 5.1.1. Now go to 'Custom iPSW' button. Click on it and choose again Official iOS 5.1.1. This will make your No Baseband firmware. To do all this, make sure that your Redsn0w is located on your Desktop, and also your iOS 5.1.1 Firmware.
j) Above given No Baseband iOS 5.1.1 firmwares (Custom iOS 5.1.1) are also uploaded here:
For iPhone 3gS: http://www.4shared.com/file/ajWY-qY5/NO_BB_iPhone22C1_511_9B206_Res.html
For iPhone 4: http://www.4shared.com/file/YA3KDSUX/NO_BB_iPhone31_511_9B206_Resto.html

[VIDEO] How to change your iPad baseband 06.15.00 back to 05.13.04 on iPhone 3g/3gS http://www.youtube.com/watch?v=nUxXcukxVVI

[VIDEO] How to Unlock iPhone 3gS WITHOUT WiFi on 5.1.1 firmware with 06.15.00 baseband http://www.youtube.com/watch?v=O-Yxv-lffn4

[VIDEO] How To download FREE/Cracked apps on your i-Device follow this video:
http://www.youtube.com/watch?v=fTwZDGzlAn4

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