How to Update iPhone 3gS from 4.XX to iOS 5.0/5.0.1 while Preserving Baseband
This video is Only for iPhone 3gS Users who depend on Ultrasn0w to Unlock their iPhones. This whole operation is done with the help of three things. Redsn0w, iOS 5.0/5.0.1 and a Custom iOS 5.0/5.0.1 firmware (also called No baseband Update firmware). Latest version of iTunes 10.5 is also required.
Download Redsn0w for Windows:
Download Redsn0w for Mac:
Download iOS 5.0 or 5.0.1 for iPhone 3gS:
Download CUSTOM iOS 5.0.1 for iPhone 3gS (New Bootrom): http://uploading.com/files/99f1df66/NO_BB_iPhone2%252C1_5.0.1_9A405_Restore.ipsw/
Download CUSTOM iOS 5.0.1 for iPhone 3gS (OLD Bootrom): http://uploading.com/files/d5m8e414/NO_BB_OLDROM_iPhone2%252C1_5.0.1_9A405_Restore.ipsw/
IMPORTANT NOTE 1: PLEASE NOTE THAT IF YOU HAVE UPDATED TO A CUSTOM IOS 5.0.1 WITH 06.15.00 BASEBAND , THEN AFTER UPDATING YOU NEED TO RUN REDSN0W 'AGAIN' AND CHOOSE 'INSTALL IPAD BASEBAND' OPTION EVEN IF YOU ALREADY HAVE 06.15.00 BASEBAND. YOU WILL GET THIS 'INSTALL IPAD BASEBAND OPTION WHEN YOU PRESS 'JAILBREAK' BUTTON AND FOLLOW THE INSTRUCTIONS IN REDSNOW.
IMPORTANT NOTE 2: Since this is a Tethered Jailbreak, in order to make it Untether simply install 'Corona 5.0.1 Untether' from Cydia after following this video. Doing so will make your jailbreak Untether.
What is Tethered Jailbreak: It Means if your battery dies on your iOS Devices or you reboot/restart , then you will get stuck on recovery screen. To get out of it, simply run Redsnow again and go to 'Extras'. Here choose 'Just boot' option and follow the instructions by putting your device in DFU mode. You will be back to normal.
Once iPhone 3gS is back to normal state now you will have Cydia on your iPhone. Folks that have 05.11.07, 05.12. 05.13.04, 06,15.00 basebands can freely install Ultrasn0w from Cydia to Unlock. And all those who still have 5.14 or 5.15 baseband will need to change their baseband to 06.15.00 by running Redsnow and choose 'iPad Baseband' option in 'Extras'.
How to Update iPhone 4 from 4.XX to iOS 5.0 or 5.0.1, here is the video: http://www.youtube.com/watch?v=bIA8xdKKv-0
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