How to unlock Samsung Galaxy S3?

How to unlock Samsung Galaxy S III GT-I9300? Are you using carrier locked Samsung Galaxy S3? Want to unlock Samsung Galaxy S3 from O2, T-mobile, TMN, Orange and Three? Today is your lucky day. You can unlock Samsung Galaxy S3 for free with Voodoo Galaxy S III SIM Unlock application. It unlocks your Samsung Galaxy S3 baseband so it becomes able to use SIM card from any carrier without restriction. Note – root access is required.

Unlock Galaxy S3

My Samsung Galaxy S3 is factory unlocked. So I can’t test Voodoo Galaxy S III SIM Unlock application is working or not. Let me know the result after you tried it. Thanks.

Please follow this guide to root Samsung Galaxy S3 if you have not do so ~ How to root Samsung Galaxy S3 with CF-Root? (Video)

Download Voodoo Galaxy S III SIM Unlock at Google Play Store here.


  1. it works!!! after using Odin by rooting it then I used it and it was unlocked. I tested it out on other carrier sim cards and it accepted it. cool!!

  2. I recentlly bought my galaxy S3 gti9300 blocked to Telcel (Mexico) , I rooted without problems and install voodoo from play Google, but doesn’t work. After run voodoo I get Sim Unlocked message in voodoo app, but I still geting network locked message or unregistered network when I try to make a call. Just emergency call where accepted

    • Hi Carlos, did you been able to solve your problem finally? I’m having the same right now…. the “unlocked” message but still not work.


      • Hi Mehdi,
        I solve the problem changing the ROM. Actually I’m using Criskelo ROM.
        But be carefull, because the last version aren’t compatible with voodoo.

  3. I unlocked my phone using this method with no problems.

    I then updated my phone with kies and its locked again. Why did this happen.??

    Will I have to repeat this process again and avoid using kies in future??

    Kind Regards


    • Voodoo Galaxy S III SIM Unlock no longer unlocks the phone with the new update, I have returned to previous firmware BLFB and rooted to get it unlocked succesfuly again.

      I will apply the new update using odin and see if it stays unlocked. Then I will know if its a kies issue, or if the new update re locks the phone.


      • Ok, I have updated to BLG6 using Odin and its the new firmware that is re locking my phone. It will not unlock again using Voodoo….

        Will have to go back to BLFB…

        OR pay to get it unlocked properly!!

        OR is there another way???

  4. Hey,

    i just bought the Samsung S3 today, i try the link for the voodoo aps, but unfortunately it was not there, would there be any other way for me to unlock my phone?


  5. i have it know. i downloaded It from the phone, but i can,t pres the active button, and i have rooted my phone.. arg its killing me. i have wastaget a hole fxxking day on guids and shit ^^

  6. could this unlock the galaxy s3 from t-mobile? cause i couldn’t find the app in google play and when i try downloading it off the internet on my computer it say the app is incompatible for the device

  7. Hi Jayce,

    The link to download Voodoo Galaxy S III SIM Unlock application isn’s valid. Do you have another way to download it or pehaps send it as an attachement to my e-mail?

    Thanks a lot,

  8. thank for quick response jace, superus is ok now i enabled it somehow i disabled but rooted phone again. the apk file is on my i use kies to export to phone then in install apk fil voodoo sim unock


  9. unlock the phone with voodoo sim unlock ? downlaoded the apk file because couldnt downlaod from first link you gave @ google play, noticed another blog asked was there another site to downalod from and you have link cos he was having same problem downlaoding from google play.


    • hi jace
      instlled voodoo unlock sim, and see exactly the same as u have at top of this page..with my ime number displayed and message saying query sim lock as seen form system, also simlock : inactive, i clicked on quuery sim and got this medial pad with numbers and a hash sign and * sign *# and numbers

      any advice becausel unlock did not highlight to use it

  10. hey jace

    thanks for lll you help and advice, what does it mean when it says sim lock inactive, and is there any free software that unlocks all phones ?

  11. hi,
    upgraded my s3. the phone is now locked asks for “sim network unlock code”. tried the method above worked after few attempts but after the phone restarted its locked again. asking the same code again after i unlock it from voodoo time and again. my carrier is three in uk now in pakistan using ufone. therefore no chance of getting the code. pls help. will upgrading to jelly bean be of any use.
    help buddy im in total trouble.

  12. hola e estado leyendo algunas de las preuntas y quisiera ver si me pueden ayudar …yo compre un samsung galaxy 3 y ya benia unlocked se podia usar en cualquier conpania… y mi preunta es sera posible que este cel c pueda activar en mexico en telcel???

  13. My GS3 I9300 got SIM locked after firmware upgrade. It is from France SFR now Im on Digicel Trinidad and Tobago.

    I rooted it successfully.

    Voodoo SIM unlock is only available in ‘pro’ version and I dont have a credit card to make the payment.

    Any please help me find a FREE sim unlock Application.

  14. Hi Jaycee,

    I have just rooted my galaxy s3 i9300, I want to unlock my phone however when I download the GalaxSim Unlock app, it says my device is not rooted?

    What can I do?

  15. I like many others bought a brand new unlocked Galaxy S3. I couldnt get the Jelly bean update but i knew it was available and after much investigation i found out it was due to my CSC code. I changed the CSC code and KIES immediately gave me the update. The problems started after the update was complete, my phone was locked and was asking for a sim unlock code.

    I have no idea what network it was locked to as i bought it unlocked from an Amazon seller so couldnt contact the network or but an unlock code as they needed this information!

    I thought i had purchased a SIM free phone but i hadn’t, i had purchased an “unlocked” phone that re-locked itself after the firmware update. I was in a state of panic!

    After more reading on excellent sites such as this i decided on my course of action:

    Root the phone, easy if you follow the instructions and have basic computer knowledge.
    Run Voodoo Galaxy SIM unlock.

    All i can say is it worked for me, my phone now makes calls again!

  16. Hi all,i have a branded s3 from orange,i bought it from someone who had it unlocked,now i updated it by Kies to 4.1.1 and the phone locked,its asking me Network pin code ….i reflashed using odin and the same thing i rooted and instaled voodoo but it says : SIM lock : read error
    if anyone could help me please give me a tutorial on how to unlock it,i appreciate it !

  17. Hi,

    I’ve followed your guide perfectly and my sgs3 is rooted and unlocked.

    The only problem is the 3g is not working. gps,wifi fine but no mobile data.

    Can you tell me what is wrong please?

    Cheers – Jim

  18. hello i got a galaxy s3 from my friend hes moveing to austrila his phone has a few months left on his contract can i order a unlock code and use as ready to go

  19. hi jayce, thanks i already root my s3 (i think). I installed galaxsim unlock, but it says i need to pay a fee for it? cant find the voodoo software?

  20. hi jayce, finally i installed voodoo on my fone, unfortunately when i start the application there’s a status in IMEI saying “SIM lock: read error Query SIM lock as seen from system” can you help me please?


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