Unlock iPhone 3G with iOS 4.0.2 using ultrasn0w 1.1-1

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Luckily for iPhone 3G users, Apple didn’t fix the vulnerability that lets redsn0w jailbreak iPhone 3G and iPod Touch 2G. The same flaw works on iOS 4.0.2 thanks to redsn0w 0.9.5b5-5. If you have updated to iOS 4.0.2 and want to jailbreak it, follow our guide here. To unlock your iPhone 3G to work with other carriers, ultrasn0w 1.1-1 is the solution which was recently upgraded from version 1.0-1 to save battery life while on standby.

Here’s a simple guide on how you can unlock your iPhone 3G:

  1. Jailbreak your iPhone 3G with redsn0w 0.9.5b5-5. Follow our guide here.
  2. Open up Cydia and tap the Manage button at the bottom. Tap sources, press the edit button on the top and then tap add. Type this repo address in the sources:http://repo666.ultrasn0w.com as shown below. unlock iPhone 3G iOS 4.0.2 with ultrasn0w 1.1-1 2
  3. Tap Add Source and wait for it to upgrade.
  4. Search for ultrasn0w (sn0w with a zero, not an O) in the search tab at the bottom. Tap it and press install at the top. unlock iPhone 3G iOS 4.0.2 with ultrasn0w 1.1-1
  5. Wait for it to install and then reboot your iPhone 3G. When it restarts, you should be able to use it with any carrier you want!
  6. If you want to enable/disable multitasking or background wallpapers on your iPhone 3G, use zToggle. We don’t recommend it though as it will suck the performance and battery out of your iPhone.

If you run into any issues or have any questions, put them in the comments below and we’ll be glad to help you out!

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33 comments

  1. Same issue as another person – no errors, no issues, but the phone is not recognizing a Verizon card or a Net10 card. Is it that I can’t use a Verizon or Net10 card in this phone? Will I be able to use a local Chinese Sim when I go back to Shanghai next week?

  2. First forgot to actually install the package after adding the repo to the sources. But finally I found the mistake and now it´s purring like a cat (with o2o SIM plus UMTS data service).

    GREAT HACK!

  3. Pingback: Jailbreak iPhone 3G with iOS 4.1/4.0 using redsn0w 0.9.6b1 [Guide] | iThinkDifferent

  5. I jailbroke my 3g on 3.1.3 n unlocked using ultrasn0w and about 2 months later i got a txt message sayin that i dont hav a data plan sooo it wuznt unlocked why?? and now i jailbroke the same phone but on 4.0.2 n wont go into cydia

  6. Here is what i did, first I jailbreak my iphone 3gs 4.0.1 (baseband 05.13.04) using jailbreakme 2.0 and then unlock using ultrasn0w 1.1-1. What happen is my iphone can recieve incoming sms but im stuck in emergency call.
    Again, I upgraded and jailbreak my iphone to 4.0.2 (same baseband) using snowbreeze 2.0.2 and then unlock using ultrasn0w 1.1-1. The same thing happens, can recieve incoming sms but stuck in emergency call. Additional information are that i did unlock it while 3g is turn off, I don’t have original sim, I’m using phonecard sim only and I’m in the middle east using local sim here. Any help?! thanks in advance.

  7. I followed the Jailbreak on here for 4.0.2 and went into Cydia but it fails when adding the new source. Any ideas?

  8. I unlocked my phone using the PwnageTool and then followed the above instructions for ultrasn0w. When I go to networks it says ‘Unable to load network list’. It was a phone locked to Fido and I am trying to use it for Telus (Canadian phone company).

    Any ideas?

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