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  1. eman619's Avatar
    Does anyone know how to unlock a Verizon version of the Samsung Galaxy s4?My buddy has an at&t sim card and wants this phone.

    Please help!!

    Thanks in advance.

    Sent from my SCH-I545 using Tapatalk 2
    10-03-2013 03:14 PM
  2. wtherrell's Avatar
    Does anyone know how to unlock a Verizon version of the Samsung Galaxy s4?My buddy has an at&t sim card and wants this phone.

    Please help!!

    Thanks in advance.

    Sent from my SCH-I545 using Tapatalk 2
    Att sim card won't work on a Verizon phone. AT&T uses GSM radios, Verizon uses CDMA. They are incompatible.


    Sent from my Hyperdriven Dev Edition Vzw SCH-I545 with KT kernel using Tapatalk 4
    Robnrbrtsn and August59 like this.
    10-03-2013 03:24 PM
  3. Junior623's Avatar
    That's not true at all. I'm currently using an at&t sim card on my verizon galaxy 4s

    Sent from my SCH-I545 using Tapatalk 4
    10-03-2013 03:29 PM
  4. wtherrell's Avatar
    That's not true at all. I'm currently using an at&t sim card on my verizon galaxy 4s

    Sent from my SCH-I545 using Tapatalk 4
    News to me. I guess I stand corrected. I apologize. Now if you could enlighten the OP and me as to how you accomplished this? I may want to switch carriers in a couple of months and would be great if I didn't have to get a different phone.

    Sent from my Hyperdriven Dev Edition Vzw SCH-I545 with KT kernel using Tapatalk 4
    10-03-2013 03:39 PM
  5. Junior623's Avatar
    Well, all I did was put in the sim. I then went to settings>connections>more networks>mobile networks and switched the "Network Mode" to "GSM/UMTS". There's a popup after that at which time I picked "Manual" and then it'll search the networks and you'll have your option to choose "AT&T"

    Now, there may be a much simplier option and that's just to select "Global" instead of "GSM/UMTS" and the only reason i'm thinking that is because that's what my phone is set on currently. (I know the other info from setting my s3 previously but that's got a few other steps to it also).

    AS for the APN settings in order to get internet, just google them... i had my best luck with HSPA+ settings to attain fastest speeds.

    Sent from my SCH-I545 using Tapatalk 4
    10-03-2013 04:01 PM
  6. tech_head's Avatar
    Att sim card won't work on a Verizon phone. AT&T uses GSM radios, Verizon uses CDMA. They are incompatible.


    Sent from my Hyperdriven Dev Edition Vzw SCH-I545 with KT kernel using Tapatalk 4
    All Verizon LTE phones are GSM capable.
    Some of the older ones require unlocking.
    I think now all are already SIM unlocked and all you need is the correct APN once you set to UMTS/GSM.
    As long as CDMA is active and you are in a Verizon area, it won't try UMTS/GSM.
    10-04-2013 09:01 PM
  7. zkqg's Avatar
    Junior623 is correct. Thanks to his step by step directions I have a Verizon Galaxy S4 (SCH-I545), running on Simple Mobile, $40/month. Talk, text, internet works. Still tweaking MMS. Can also use Go SMS Pro (third party app for MMS). 3G speed verified with Speedtest.
    wtherrell and Lord_Cythis like this.
    10-13-2013 10:39 PM
  8. madisonjar's Avatar
    All Verizon LTE phones are GSM capable.
    Some of the older ones require unlocking.
    I think now all are already SIM unlocked and all you need is the correct APN once you set to UMTS/GSM.
    As long as CDMA is active and you are in a Verizon area, it won't try UMTS/GSM.
    this.
    Lord_Cythis likes this.
    10-15-2013 04:04 PM
  9. caturah's Avatar
    I recently bought my friends verizon s4 had it unlocked to cricket and now the verizon logo and apps are still running and the internet is not working properly!!! Do you have any idea what's the problem
    10-17-2013 10:51 AM
  10. djisia87's Avatar
    @tech_head
    older Verizon LTE devices cant be unlocked via code. its all based on software tweak. Similar to Razr XT912 where 4.0.4 didnt support GSM outside of U.S. or in U.S. but 4.1.2 enabled that feature for overseas. Samsung S3/S4 are GSM enabled out of box where you can install any GSM sim ( in U.S. and outside of U.S.) and it will work (talk and text, web and mms need APN settings)
    10-17-2013 12:53 PM
  11. djisia87's Avatar
    I recently bought my friends verizon s4 had it unlocked to cricket and now the verizon logo and apps are still running and the internet is not working properly!!! Do you have any idea what's the problem
    switching any cdma device from orignal carrier to another one called flashing where you need to modify CDMA (not GSM) settings such as NAM, EVDO and M.IP profiles. I have S4 on Cricket myself
    10-17-2013 12:57 PM
  12. caturah's Avatar
    I recently had my Galaxy s4 flashed to Cricket and now my internet is not working. It's coming in and out and when I charge the phone I have not service at all. Ever since I flashed my phone it's been a nightmare. I want to switch to T-Mobile or simple mobile. I'm just concerned if it's really that easy to switch to them.
    10-27-2013 03:36 PM
  13. tech_head's Avatar
    Should be. Get the correct APN and you should be good to go.
    I would ODIN back to the latest Verizon software before doing that though.
    10-27-2013 09:35 PM
  14. uscpte7's Avatar
    Thanks for the info. Are you saying that the Verizon S4 is SIM unlocked out of the box? I'm rooted on the latest 4.2.2 firmware and getting ready for an overseas trip. So I can just get a local SIM and good to go. Also, shouldn't the SIM contain info on the APNs?
    10-30-2013 10:37 AM
  15. schpoink's Avatar
    the Verizon rep i bought my s4 from said they will unlock the phone after 60 days
    11-02-2013 11:25 PM
  16. Jennifer Pauer's Avatar
    I have had the same exact issue with my Galaxy s4 and stumbled upon your instructions, and after applying these changes my non working locked verizon phone FINALLY worked with my walmart family share mobile SIM !! that is too cool!! I knew these phones were unlocked which is why I purchased one, but was not willing to pay these crazy high contractual prices, but could not get a straight answer when I wanted to change carriers! Thanks so much! Does this mean though, I will not have internet access, just talk and text? Haven't even tried the phone yet, just performed your unlock and was so excited I had to tell others this worked before I even tried my phone! I will repost with an update when I go through the phone!
    12-08-2013 10:09 AM
  17. hopeful aj's Avatar
    I want to thank you so much for your post! I have been searching forever and I almost paid 40 bucks in order to unlock my phone. The information about the APN was also very helpful. I have my S4 back now, I don't have to be stuck with a Verizon contract, and I couldn't be happier! Thank you so much!!!!!!!!!!
    12-12-2013 09:51 PM
  18. BBTree's Avatar
    VZW unlock if switching sim and apn doesn't work..

    Enter Phone Menu..

    *#27663368378#
    [1]UMTS
    [2]DEBUG
    [6]PHONE CONTROL
    [6]NETWORK LOCK
    [3]PERSOSHA256 OFF
    MENU > BACK 3 TIMES.. [UMTS MAIN MENU]
    [6]COMMON
    [6]NV REBUILD

    If it says GOLDEN-BACKUP exists..

    [4]RESTORE BACK-UP

    REBOOT

    UNLOCKED.
    Lord_Cythis likes this.
    12-24-2013 06:19 PM
  19. Usman Mirza1's Avatar
    Anyone know how to unlock GS4 for Cricket (CDMA) to GSM (AT&T) I want to switch networks because the cricket network in my area is HORRIBLE, however AT&T's 4G LTE is kickass. I've been looking for a solution for the past 3 days regarding this issue. I know that most phones that are CDMA are required to be "Flashed" to another network that's CDMA compatible. Whats interesting is that my GS4 (Cricket) accepts SIM cards or at least it seems like it does, I don't have extensive knowledge on this however I am an IT guy and know my in's and out's.

    Any help would be much appreciated!
    12-30-2013 11:14 AM
  20. calemus's Avatar
    im currently using vzw i545
    none of the above mentioned options function for my phone
    i asume this is because verizon has located the data posted and combated it

    if anyone knows how i can SIM-unlock, and get to flash pacman rom
    i would GREATLY apreciate a tutorial tyvm
    01-19-2014 11:30 AM
  21. tech_head's Avatar
    im currently using vzw i545
    none of the above mentioned options function for my phone
    i asume this is because verizon has located the data posted and combated it

    if anyone knows how i can SIM-unlock, and get to flash pacman rom
    i would GREATLY apreciate a tutorial tyvm
    SIM unlock is not required for a Verizon SCh-i545.
    unless you are running build ending with MDK, forget about a ROM.
    No exploit for the bootloader on anything after MDK, no Loki, no nothing.
    01-20-2014 06:21 PM
  22. adoboeater415's Avatar
    how did you make the internet work?
    01-23-2014 12:30 AM
  23. calemus's Avatar
    on mk2 now
    01-23-2014 01:33 AM
  24. kamolesh's Avatar
    my phone dose not taking that code. plz help me.
    01-28-2014 01:55 AM
  25. Vaionic's Avatar
    Hi. I bought an unlocked Verizon GS4 off ebay and need a micro sim card for it. I use Straight Talk as my provider. Do I have to switch to their AT&T coverage to do so? I have never had good service with AT&T and would like to continue with Verizon, but haven't had a response back yet from Straight Talk what my options are.

    Many thanks.
    02-03-2014 05:52 PM
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