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How To SIM Unlock Samsung Galaxy S4 for Free

If you’ve purchased your Samsung Galaxy S4 from a carrier, then it’s probably locked on that network and you need to SIM unlock it in order to use it on another one. Fortunately for you we have found some easy ways to SIM unlock the Galaxy S4 and you can do it for free.

The reason to SIM unlock your Samsung Galaxy S4 is to be able to use it on another carrier and that’s why SIM locks exist, because carriers don’t want you to leave their network.

If you need to use a SIM from another carrier with your Galaxy S4, then follow the guide below in order to unlock it. We’ll provide you with two methods. One of them is free and only takes a few minutes, while the other one requires you to buy an unlock code, but it can be slightly easier.

You should know that by SIM unlocking your Galaxy S4, it doesn’t mean it will work with any carrier, because it depends on the GSM bands each carrier is using, so you should first check that your smartphone is compatible with it. Make sure to check all bands, including the 2G, 3G, and 4G, because some carriers use different ones and while you might be able to make calls, the data could not work.

Now that we’ve told you what SIM unlocking involves, let’s get to the part where we tell you how to do it. We’ll start with the free method, because it’s our favorite.

How to SIM Unlock the Galaxy S4

This method is totally free, but you have to be careful and follow every step without mistakes, because otherwise you might brick your device. So make sure you don’t do anything wrong and that your phone has enough battery so it won’t turn off during the process.

This should work for all variants of the Samsung Galaxy S4, including I9500, I9505, I9506, I9505G, I337, M919, I545, L720, R970, I959, I9502, I337M, M919V, R970X, and R970C.

  1. Open the phone dialer
  2. Dial *#0011#
  3. Press Menu
  4. Tap Back
  5. Press Menu and open the Key input
  6. Enter 1 and press OK
  7. Press Menu and tap Back
  8. Tap [1]UMTS
  9. Tap [1]DEBUG SCREEN
  10. Tap [6]PHONE CONTROL
  11. Tap [6]NETWORK LOCK
  12. Tap [3]PERSO SHA256 OFF
  13. Press Menu and then Back
  14. Tap [6]COMMON
  15. Tap [6]NV REBUILD
  16. Tap [4]RESTORE BACK UP
  17. Now your device will freeze, but don’t worry. Be patient and press Menu when you can, then Back key ON.
  18. Your device will now reboot.

Now your Samsung Galaxy S4 should be SIM unlocked.

We can’t guarantee this method is going to work, but if it doesn’t then you can try the alternative method, which requires you to buy an unlock code.

First you will need to find your IMEI code. You can find it either by going to Settings > About device > Status or by dialing **#06#*.

Then head over to DoctorSIM and purchase an unlock code for your IMEI.

Another alternative would be to contact your carrier, because it might unlock your device for free or for a fee.

If you encounter any issues while SIM unlocking your Galaxy S4, please let us know.

Samsung Galaxy S4 Articles


    I tried to use thsi formula to unlock my GT-I9505 purchased in Venezuela (DIGITEL Carrier). this formula was not working. The owner block the setup and you can not made manual unlock.

    I use a Formula like CHIMERA APP. Look in Google and you will solve this point.

    • gargoile

      Hola Amigo, una pregunta, sabes si el chimera es compatible para el S4 Internacional? GT-I9500 ???
      Desde Ya, Muchas Gracias!!!

      • VZLA SI SE PUEDE !!!

        Supongo que si… Yo lo hice con mi GT, – I9505 y me funciono.. Lo probé con un SIM de T-Mobile y todo bien. Suerte

  • Sanford Boulden

    Can this be used to allow you to change the firmware? My carrier can’t send updates. I want to get software updates. Will this help?

    • VZLA SI SE PUEDE !!!

      After you unlock, you won’t receive an OTA update

  • Roger

    Doesn’t work with M919 which is the t-mobile variant, It probably has to do with it being up to kitkat 4.4.2 , this method works before kitkat, I got to step 6, where i entered 1 into ‘key input’ but nothing happened

    • Orlov Nicolae

      same at my AT&T

    • jevoun tyrell

      try typing “Q0” exactly as quoted and wait a couple seconds

      • Sjlana Rochester

        Mine still only had 1 and 2 option after the network lock step. What am I doing wrong. Took me all day to figure out the Q0 thing

    • Richard Jones

      Can you make a video for those of us who are having trouble understanding the steps. Thanks

      • Richard

        Sorry, this was meant for Bogdan, not Roger.

  • Artiom Sikotorski

    Can I I use it on my sprint s4 with the 4.4 update

  • Lee

    Do u know how to unlock Galaxy Note 2 that running android 4.4.2 using service mode?i already had unlock code from unlock code developer but its not work.
    Using *#197328640# doesn’t work.

  • Aimee

    I have GS4 T-Mobile M919 I’ve tried this method an the menu with UMTS doesnt appear after entering the ‘key imput’ I don’t want to mess up the phone, so I don’t try an mess around with it to find the menu. Im So Frustrated, all I want is to be able to use this awesome phone! Please Help!!!

  • irfan

    in the service mode from menu tap key input and enter 1 pressing ok no other options appears there. wha i will do help me.

    • tater26

      Having the same problem. What to do !?

    • brian

      Me too

    • danigarra

      Try with “Q0”

      • Nathan

        I used that and it worked up until step 12, it didn’t show that option

    • Laura Lopin

      It doesn’t work for me! but surprisingly i found this site Cphoneunlocker. Com got my phone unlocked for free! Glad I didn’t have to pay moneyfor it. I’m just giving actual advice to everyone. Don’tpay, get it for free!” i hope that helped you guys

      • Bill

        Survey scam that you NEVER get to the end of

  • Geeks_r_us

    Worked for Samsung Galaxy 4 on A&T in US!! I couldn’t get to 14 from 13. So I had to navigate the menus myself a few times by restarting the process (1-7) and once I get to the menu where I saw the [6]COMMON
    Long story short, I’m here in India using my samsung galaxy for a local carrier with no problems whatsoever.
    Thanks mate!!!

    • Amit

      are you sure it worked? I am planning to do the same to use it in India as well from next week.

      • Geo Thayil

        Any luck? My carrier is At&T as well and needed to use it in India for my trip as well.

    • Ochi

      Hi Geeks_r_us,

      could you please be a bit more specific? I cannot figure out how to get to step 8. Am I supposed to see “Tap [1]UMTS” somewhere? Thanks!

      • Sjlana Rochester

        I can’t get to the second menu opinions. After I press 1 and back it doesn’t change to the umts ect.

  • Liz

    I typed in the number and the menu never popped up

    • Lisa Giesbrecht

      If on Lollipop use Q0 or Q0000

  • Gummy

    When doing this, should the new sim card; from the new carrier be in the phone?

  • Orlov Nicolae

    hello, at my s4 sgh-i337 AT&T after key input never apeared the meniu why ?? 🙁 can you help me?

  • Kenneth Brunstein

    makes phone reboot

  • trinie

    How do you do Tap [1]UMTS when you type

  • Creecher

    I am already out of country (I didn’t unlock while I was stateside) and currently my sprint account is deactivated. I already have a new SIM card from O2 out here) but when I go I get No Service and IMEI CERTI: NA. What should I do?

  • my boy

    I’m on vacation over sea purchased a Sim here but my phone will not open (Samsung 4) any one knows the pin and how to fix it please help.

  • nel

    Cannot find the phone control option

  • freda

    I have a 4 digit pin but its not working

  • Kimberlydawn Ryan

    I couldn’t do steps 8 and on because they don’t shpw up
    Tap [1]UMTS
    Tap [3]PERSO SHA256 OFF

  • Jasson Allen Carey

    dont work with the sph-L720 i was told that the sprint will work on verizon carrier base roms to flash verizon base rom an slip in the sim an it will work i did all that an it dont work. its telling me that i need to change the csc package files ???????? idk its got me all confused can anyone help me call me at 9894643242

  • Dee

    Hi there! How do the steps differ for the Samsung Galaxy S4 Mini?

  • Shawntel

    After I do step 7 it dont do anything except say no service what dose that mean?
    And what dose [1]UMTS mean?

  • CrazeeMe549

    Mine is a s4 sgh-1337m and it didn’t give me an option… It only says Perso Sha256 info– That’s It! What’s going on???? HELP!

  • porertq

    this is gay

  • Robby Smales

    this don’t work as not give all options says above just as all other websites have same don’t work at all !!!!!!!!!!

  • Peter Ritchie

    Only one option for perso sha256 info. Rogers s4 I337m

  • Bob Barker

    Hey guys, if the article isn’t working because you can’t get to the next menu, try this method, posted by DoctorNick from Disqus (props man, thanks for posting)


    Celularesrra Rivas

    11 days ago

    Formatted a bit better:

    If the above instructions do not work for you, try this:

    1) Enter *#0011# on the keypad, this should show service mode with a bunch of statistics

    2) Press the bottom left menu button.

    3) When the menu pops up, select “back” (NOT the physical back key, the menu option)

    4) repeat steps 2 and 3 two more times (for a total of three times)

    5) Press the bottom left menu button, select “Key Input”,

    7) When the input field appears on the screen, select it and type “1”, then hit the “OK” button

    9) Press the bottom left menu button, select “Key Input”

    10) Enter the captial letter “Q”, then hit the “OK” button

    11) Press the bottom left menu button, select “Key Input”

    12) Enter “0000” (4 zeroes), then hit the “OK” button.

    Wait for up to 20 seconds. The MAIN MENU should appear. (If the MAIN
    MENU does not appear by then, hit the “HOME” button and start over from

    14) Select “[1] UTMS”

    15) Select “[6] COMMON”

    16 Select “[6] NV REBUILD”

    17. Select “[4] Restore Back-up”

    18. Your cell phone should restart. You should now have an unlocked phone!

    • Tenzin

      Thank u sooo much

    • Jason yeaman

      Thank you, This method worked perfectly for me.

    • Mike Bartoli

      still very clear……Enter #0011# on what keypad???

    • Josh

      This worked for my Samsung S4 (GT-I9505), locked to Telstra in Australia.
      Thanks very much!! 🙂

    • T.J. Brown

      it says “Not support in custom binary!”

      after i select nv rebuild what do I do?

    • Harsh Pathak

      completed all steps but phone is still locked….now what to do..?

    • CL

      Works for me. Thank you so much!

    • CJ

      AMAZING! worked perfectly for me.. with Swedish 3

    • Carlon

      Should I have my new sim card in my phone already or take out the new sim?

    • Muchiri

      phone is unlocked but when i put a sim card it still asks for the network pin.please advice

    • Sean Rosaasen

      says on mine restore back up not available or somethiong….

    • Tony

      your instructions worked expect it still asking for the unlock or to dismiss. What did I forget something?

    • Jason Pacilan

      it helps for may 1337…thanks a lot…

    • Jon M Pugh

      How do I know for sure? Try sim card from another carrier or is their another way to tell? Thanks,

    • darwinism14

      on a locked AT&T Samsung S4 sgh-i337

  • BAD Ben

    Do you have to have the Carrier SIM? I mean, I have a T-Mobile S4 on 4.4.4 kit kat (stock, no root), but I don’t have a T-Mobile SIM.

  • Bernard Akuamoah Boateng

    doesn’ work on I9500

  • Nazmush Sayadat

    after taping key input 1, next screen telling that- menu not exist…. 🙁

  • Ron

    it’s still asking for an unlock PIN?

  • Catherine

    Hi, cannot get to step 12, ‘Tap [3]PERSO SHA256 OFF’ – my S4 is software version 5.0.1. and it is locked with Canadian Bell Mobility. Any help would be greatly appreciated. Thanks!

  • Jamie Moesch

    Samsung Galaxy Secret Code
    *#06# (Display IMEI number)
    *#1234# (Display current firmware)
    *#*#4636#*#* (Diagnostic and general settings mode)
    *#*#7780#*#* (Factory soft reset)
    or *#7780#
    *2767*3855# (Factory hard reset to ROM firmware default settings)
    *2767*4387264636# (To display product code)
    *#272*imei#* (Display/change CSC code)
    or *#272*HHMM#*
    *#*#1472365#*#* (GPS test settings)
    *#*#197328640#*#* (Service mode main menu)
    *#12580*369# (SW & HW Info)
    *#232337# (Bluetooth Address)
    *#232331# (Bluetooth Test Mode)
    *#232338# (WLAN MAC Address)
    *#0228# (ADC Reading)
    *#32489# (Ciphering Info)
    *#2263# (RF Band Selection)
    *#9090# (Diagnostic ConfiguratioN)
    *#7284# (USB I2C Mode Control)
    *#232339# (WLAN Test Mode)
    *#0842# (Vibra Motor Test Mode)
    *#0782# (Real Time Clock Test)
    *#0673# (Audio Test Mode)
    *#0*# (General Test Mode)
    *#872564# (USB Logging Control)
    *#4238378# (GCF Configuration)
    *#0283# (Audio Loopback Control)
    *#1575# (GPS Control Menu)
    *#3214789650# (LBS Test Mode)
    *#745# (RIL Dump Menu)
    *#03# (NAND Flash S/N)
    *#0589# (Light Sensor Test Mode)
    *#0588# (Proximity Sensor Test Mode)
    *#273283*255*3282*# (Data Create Menu)
    *#34971539# (Camera Firmware Update)
    *#526# (WLAN Engineering Mode)
    *#746# (Debug Dump Menu)
    *#9900# (System Dump Mode)
    *#44336# (Sofware Version Info)
    *#273283*255*663282*# (Data Create SD Card)
    *#3282*727336*# (Data Usage Status)
    *#7594# (Remap Shutdown to End Call TSK)
    *#0289# (Melody Test Mode)
    *#2663# (TSP / TSK firmware update)
    *#528# (WLAN Engineering Mode)
    *#7412365# (Camera Firmware Menu)
    or *#*#34971539#*#*
    *#80# (Unknown)
    *#07# (Test History)
    *#3214789# (GCF Mode Status)
    *#272886# (Auto Answer Selection)
    *#8736364# (OTA Update Menu)
    *#301279# (HSDPA/HSUPA Control Menu)
    *#7353# (Quick Test Menu)
    *2767*4387264636# (Sellout SMS / PCODE view)
    *#7465625# (View Phone Lock Status)
    *7465625*782*# (Configure Network Lock NSP)
    *7465625*27*# (Insert Network Lock Keycode NSP/CP)
    #7465625*27*# (Insert Content Provider Keycode)
    #7465625*782*# (Insert Partitial Network Lock Keycode)
    *7465625*77*# (Insert Network Lock Keycode SP)
    #7465625*77*# (Insert Operator Lock Keycode)
    *7465625*638*# (Configure Network Lock MCC/MNC)
    #7465625*638*# (Insert Network Lock Keycode)

  • Jamie Moesch

    hope it helps some

  • Dylan

    i was trying it and i dont have service so do i need to get it activated first before i can even try this?

  • Ivi

    oh my gosh! it worked. after following the instructions and your comments, it worked on my phone. Thank you so much!

  • Kyrylo

    Hi, cannot get to step 12, ‘Tap [3]PERSO SHA256 OFF’ – my S4 is software version 5.0.1.

  • Jon M Pugh

    didnt work

  • Jon M Pugh

    Ok so I think the other persons instructions worked! Now, how do I get rid of the Tmobile logo and jingle at startup?? Has to be a way.

  • gabak

    it does not work in 9500

  • Kandasamy

    Hi this code worked very well for me to my Samsung Galaxy S4. My Airtel India Sim was not getting detected. Followed all the 18 steps given above. Worked fine except I had to restart manually. Now my sim card works fine. Thanks a lot.

  • Bohomama1

    Problem the symbols * # are NOT on phone keyboard only numbers show no choice for symbols now have only 9 tries left. What’s the secret? I refuse to pay carrier as I pre paid the 1st of this month. Technically, they owe me money. Please help. bohomama1@Hotmail.com