iPhone 4, No Carrier Signal After iOS 4.3.3 Jailbreak Using PwnageTool

Hello Nick, have you installed Ultrsn0w on your iPhone after jailbreaking it using PwnageTool 4.3.3? If yes, then you probably experiencing “one signal bar” issue on you jailbroken iPhone 4. For your information, Apple has implemented a new ASLR security feature in iOS 4.3.x and the only possible fix for this is by installing the latest version of Ultrasn0w carrier unlocking tool. And those who don’t care about unlocking should also install Ultrasn0w 1.2.3 in order to make sure that there will be no error after jailbreaking the new iPhone firmware. Just follow the tutorial posted below to install Ultrasn0w 1.2.3:

Step 1: Launch Cydia app form the springboard of your jailbroken iPhone.
Step 2: Then followed by tapping on the Manage tab at the bottom of Cydia and then tap on Sources section to view your current Cydia repos.
Step 3: Tap on the Edit button on the top-right corner followed by a tap on Add button on the top-left corner. When Cydia will prompt you for the repo address, enter http://repo666.ultrasn0w.com as Cydia/APT URL and hit Add Source button (skip this step if you have already added repo666.ultrasn0w.com repo).
Step 4: Now, tap on the Search tab at the bottom of Cydia and search for Ultrasn0w. Please be note that you should download Utrasn0w form the official Ultrasn0w repo as other 3rd-party Cydia repos also host the tool.

Once the installation competed, reboot your iPhone. That’s it. Yu have fixed the “one signal bar” glitch on your iPhone 4.