Tip & How-To about Apple iPhone Smartphone
This will guide you on updating your iPhone 4 to iOS version 4.1 while retaining / keeping your baseband to 01.59.00.
This is for iPhone 4's which are currently on an older iOS version - 4.0.2, 4.0.1 or 4.0. If you didn't do when you update to 4.1, this process cannot downgrade your baseband from 02.10.04 to 01.59.00. This will only keep the 01.59.00 baseband when UPDATING to 4.1.
WARNING: This is for iPhone 4 ONLY! DO NOT attempt to do this on an iPhone 3GS or 3G. I tried this on one of my iPhone 3G, and it failed, the baseband was updated! The result, it can't be unlocked! I assume the same will happen on a 3GS although I haven't tested it yet.
Download Umbrella for PC (Windows) HERE.
Download Umbrella for Mac HERE.
Download iPhone3,1_4.1_8B117_Restore.ipsw HERE.
Save these files on your desktop for easy access.
Don't worry if you don't have a legit sim card, limera1n can hactivate your device. Please backup your iPhone 4 first before you continue.
Posted by kid_ant on
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