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Jailbroken iPhone 3GS: No Signal After Upgrading to iOS 4.3.3

Hello guys, I have a serious problem on my device. I have accidentally upgraded my jailbroken and unlocked iPhone 3GS to iOS 4.3.1. And as result, I got stuck on iTunes endless recovery mode loop. But fortunately the cell phone technician has managed to fix it and upgrade my iPhone to iOS 4.3.3 and then jailbreak it. However, I can’t use it because it has no cellular signal and Wi-Fi. What should I do to fix this? Thanks. 

Asked by: Jun fromHuntsville, Alabama 

Hello Jun, you probably experiencing 1 signal bar bug on your iPhone 3GS. You can check your signal strength by dialing *3001#12345#* and then compare your signal strength to other iPhone or smartphones. This is because Apple has implemented a new ASLR security feature in iOS 4.3.x. Anyway, you can easily fix this 1 signal bar bug by downloading and installing the latest version of Ultrasn0w. If you aren’t familiar with the steps, then you can follow the step by step geode posted below to download Ultrasn0w 1.2.3:

Step 1: Launch Cydia app on your jailbroken iPhone.

Step 2: Then tap on the Manage tab at the bottom of Cydia and followed by tapping on Sources section to view your current Cydia repos. If you see repo666.ultrasn0w.com already added in your current sources list, jump to step 4 otherwise continue to the next step.

Step 3: Now you have to tap on the Edit button and followed by tapping on Add button. Then enter http://repo666.ultrasn0w.com as Cydia/APT URL and hit Add Source button.

Step 4: Wait while Cydia updates its database. Once done, hit the Search tab and type Ultrasn0w in the search field.

Step 5: From the search results, select Ultrasn0w and tap on Install button.

Step 6: Cydia will now install Ultrasn0w 1.2.3 on your iPhone. Once completely installed, tap on the Reboot Device button to restart your iPhone.

That’s it! Fix iPhone One Signal Bar

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