iPhone Dev Team has released Ultrasnow 1.3 to unlock iPhone 4 iOS 4.3.2 with baseband 04.10.01 that Ultrasnow 1.2.1 can't unlocked. This tutorial describes how to use ultrasnow 1.3 to unlock your iPhone 4 with baseband 04.10.01 on iOS 4.3.2, so that your iPhone 4 can use any network operator's SIM card. Here is the guide for you:
Step 1: Start the Cydia program. Select "Manage" to enter the Management tab.
Step 6: Click the upper right corner of the "Install" button to install ultrasn0w. Press "Confirm" to continue.
Step 7: After download and install successfully, click "Restart SpringBoard" off of your iPhone under the ultrasn0w unlock patch to complete the installation, then you can use your iPhone to any carrier SIM card.
Until now you Unlocked iPhone 4 Baseband 02.10.04 / 03.10.01 / 04.10.01 on iOS 4.3.3/4.3.2. After unlock you may play these toughest games more smoothly on iPhone.