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How to SIM unlock Samsung Galaxy S2 i9100 for free

Unfortunately if you buy a Samsung Galaxy S2 i9100 on contract it will come SIM-locked so you will not be able to use it on another carrier, either from your country or another one. In order to be able to use the SIM from another carrier, the Galaxy S2 must be unlocked. After unlocking your device will be SIM free and it will be working with virtually any SIM.

Before we begin the unlocking guide, you have to know that your Galaxy S2 must be rooted, so its warranty will be void. Please note that you are doing this at your own risk and there is a risk of bricking your device. We tested both the root and unlock methods and have proven to be safe, but you need to make sure that you follow all the steps and don’t miss anything.

To root your device we do have some guides, depending on what ROM your device is running one. Root your device running Ice Cream Sandwich 4.0.3 XXLPS, XWLP3 or XXLPQ.

Once your device is rooted, you will have to download and install an app from Google Play and then run it. Here’s what you have to do:

  1. Download and install Galaxy S2 SIM unlock here.
  2. Make sure that your device’s battery is at least 30% full, because it might take some time.
  3. Launch the application and tap “SIM unlock code”.
  4. Once you get the code, note it down and shut down your device.
  5. Insert a SIM from a different carrier and turn on your phone.
  6. When your Galaxy S2 requires you to insert the code, use the one you noted down.
  7. If the code works, your device is now unlocked. But if it didn’t, you should NOT try it again because your device might get freezed.

Please let us know if you managed to unlock your Samsung Galaxy S2 or if you’ve had any problems and we will do our best to help.

  • Vc

    I can’t unlock mine 🙁

  • Rob

    Has not worked on mine any other ideas

  • Anthony Dunne

    Rooted Phone all ok Installed Galaxy S2 SIM unlock and not work (Could not find SIM unlock code 🙁 )

    Had no problem rooting the phone I am on 4.0.3. Followed your steps all perfect used Odins3 and Galaxy s2 SIM unlock and it found no code here is the message I got .
    (Could not find SIM unlock code 🙁 )
    Any help would be great full. Regards Anthony

  • I have a blacklisted S2….I rooted it and installed everything no problem. It can’t find the sim unlock code though. I may need to try a different network sim card? It can’t find the unfreeze code either. Is this unfreeze code meant to unblacklist the phone? If you can help me to sort this out I will be only too happy to make a donation. Thanks in advance, Sean

  • Ross

    Blacklisted is blacklisted. Never gonna work.

  • prabashrox chathuranga

    thanks you soooooooooo much it does what it says i unlock my gs2 love you guyzz

  • aarondickahandroid

    Hello, I tried the sim unlocker but it said code could not be found. Please could you help?

  • I purchased a Samsung Galaxy S2. I have not taken it out of the package yet or activated it with Straight Talk. What do I do to unlock it?

  • charles

    please i need to unlock huawei u8800

  • My lil cusin was playing with my cell and he blocked it. Its asking for my email and
    password. I already put it and still bloked.

  • DanielDorilas1

    in case you need to unlock samsung galaxy s2 or s3 from at&t contact this website they are very recommended http://www.wejustunlock.com thy have unlock code at cheap price

  • wendy

    Rooted the phone and it would not boot up again. l could still go into recovery mode and download mode. I went into download mode and set it back to factory using odin. I then flashed it to jelly bean. I tried rooting it again and this time root program did not even recognise my phone. I kept getting the message ‘device not connected’.
    Can i still unlock my phone?

  • Edwardo Luccus

    Can I switch a AT&T SIM card s2, to a boost mobile sim?

  • Edwardo Luccus

    And what do I need to do?

  • mark

    Mine gets to stage 4/5 then always closes..no idea why. Cyanogen Mod 10.2….any thoughts?

  • Arcana

    Got the code but it did not unlock finnish sim prepaid card toa croatian phone. Why?