1. epicness4G's Avatar
    If I unlocked my att Samsung Galaxy s4 will LTE work on t-mobile? I know the hspa+ will work on refarmed areas but will LTE work? I live in a T-Mobile lte area

    Sent from my SGH-T889 using Tapatalk 4 Beta
    06-27-2013 01:08 AM
  2. nelonez's Avatar
    Yes it does... I have mine unlocked and and I put in my tmobile sim card and it work here in the Dallas area...

    Sent from my SAMSUNG-SGH-I337 using AC Forums mobile app
    Attached Thumbnails AT&T S4 unlocked LTE on T-Mobile?-1372310073240.jpg  
    06-27-2013 01:14 AM
  3. epicness4G's Avatar
    Perfect thank you so much.

    Sent from my SGH-T889 using Tapatalk 4 Beta
    06-27-2013 01:46 AM
  4. epicness4G's Avatar
    Does the s4 work on all t mobile bands including non refarmed tmobile bands to match att?

    Sent from my SAMSUNG-SGH-I337 using Tapatalk 4 Beta
    06-27-2013 04:00 PM
  5. demsid's Avatar
    How did you guys unlocked your S4? Can you please share? Thanks.
    06-27-2013 07:59 PM
  6. nelonez's Avatar
    How did you guys unlocked your S4? Can you please share? Thanks.
    Send me a PM

    Sent from my SAMSUNG-SGH-I337 using AC Forums mobile app
    06-28-2013 12:09 AM
  7. epicness4G's Avatar
    How did you guys unlocked your S4? Can you please share? Thanks.
    I contacted att international care chat and they unlocked it for me. They always unlock my non IPhone devices without any issues.

    Sent from my SAMSUNG-SGH-I337 using Tapatalk 4 Beta
    06-28-2013 01:36 AM
  8. epicness4G's Avatar
    Besides the t mobile features such as WiFi calling. What do you lose from actually using a T-Mobile s4 on T-Mobile over using an att s4 unlocked on T-Mobile?

    Sent from my SAMSUNG-SGH-I337 using Tapatalk 2
    08-01-2013 01:38 AM
  9. Mellimel22's Avatar
    If the area doesn't have refarmed hspa+ u will only have lte or edge.

    Sent from my T-Mobile LG Escape using Tapatalk 2
    08-01-2013 02:59 AM
  10. jamesedward318's Avatar
    I went over to T-Mobile last weekend because I wanted unlimited data badly! Sadly their network sucked in my area. I came back to AT&T.
    08-01-2013 10:44 AM
  11. Mellimel22's Avatar
    Well don't on mine lol.

    Sent from my T-Mobile LG Escape using Tapatalk 2
    Attached Thumbnails AT&T S4 unlocked LTE on T-Mobile?-uploadfromtaptalk1375374792326.jpg  
    08-01-2013 12:33 PM
  12. epicness4G's Avatar
    Yeah most of south Florida has refarmed hspa+ so this is a non issue for me thankfully.

    Sent from my SAMSUNG-SGH-I337 using Tapatalk 2
    08-01-2013 06:23 PM
  13. pwnyfizz's Avatar
    Thanks for the clarification. I keep seeing 4G LTE on my ATT S4 with my Tmobile Sim but I was not sure if it was really LTE.

    Why are there tutorials for "How to Enable T-Mobile HSPA+ AWS Bands on AT&T Galaxy S4 SGH-i337/SGH-i337M!"

    Does this mean that the 4G LTE bands work but 3G/4G HSPA+ bands do not work? I do see regular 4G on my phone sometimes which I assume was just HSPA+.
    08-15-2013 12:15 AM
  14. Brandon32's Avatar
    I am using a T Mobile SIM on my unlocked AT&T S4 and notice the following problem ..... when my S4 changes cell tower (eg. I leave home and go to office or somewhere else), my S4 will lose data connection although it still have 5 full bars coverage To get the data back, I just have to dial any number and I will see my data signal come back. Does anyone have this issue?
    10-28-2013 11:02 AM
  15. floridarick's Avatar
    Thanks for the clarification. I keep seeing 4G LTE on my ATT S4 with my Tmobile Sim but I was not sure if it was really LTE.

    Why are there tutorials for "How to Enable T-Mobile HSPA+ AWS Bands on AT&T Galaxy S4 SGH-i337/SGH-i337M!"

    Does this mean that the 4G LTE bands work but 3G/4G HSPA+ bands do not work? I do see regular 4G on my phone sometimes which I assume was just HSPA+.
    You need to do that for an area that dose not have "refrarmed" HSPA+ yet.....

    I got my unlock code for my S4A from ATT customer service. I told them I was travailing to Europe and needed to use prepaid sims when on vacation. I am now Happily on T-Mobile in S. Florida. Great 4G LTE, 3G/4G & HSPA+ no modifications needed.
    10-28-2013 11:44 AM
  16. Ezra Shanti's Avatar
    Yes, I have this same issue and apparently it has to do with the non-refarmed HSPA+ stuff....Although it cuts out completely for me on the regular and I have to dial a # and hang up. Then it seems to stay on if it's being used, and when I stop using it, it will disappear in a few minutes. I'm thinking about selling it on ebay and getting a T-Mobile or fully unlockable phone. Would it be fair to sell this as unlocked? I mean, it is unlocked but the data issue is still a pain in the **** for T-Mobile users.
    11-04-2013 09:09 PM
  17. phil387's Avatar
    Yes, I am having the same issue with my ATT GS4. Been searching all over the net for this fix but looks like nothing.


    I am using a T Mobile SIM on my unlocked AT&T S4 and notice the following problem ..... when my S4 changes cell tower (eg. I leave home and go to office or somewhere else), my S4 will lose data connection although it still have 5 full bars coverage To get the data back, I just have to dial any number and I will see my data signal come back. Does anyone have this issue?
    11-11-2013 06:04 PM
  18. mrtimo's Avatar
    Any updates? Just found this thread. I have the same issue.
    11-25-2013 03:00 PM
  19. Central n ohios best's Avatar
    U have to use that workaround if u aren't in a refarmed area.

    Sent from my LG Escape running 4.1.2 using Tapatalk 2 (Central n Ohio Austin IL)
    11-25-2013 03:29 PM
  20. DanDee26's Avatar
    I bought an ATT S4 from a friend recently. I have T-Mobile and do not have an att account to call in and request the unlock code. Anyone know of an alternate method?
    12-09-2013 09:23 PM
  21. tony1208's Avatar
    I just switched over to tmo with my unlocked att gs4 and i can not get the hotspot to work... tmo service said its because its a att cell and not all features work...walk around??
    01-16-2014 06:32 AM
  22. Tim Frentz's Avatar
    see my notes at freeHelpingHands.wordpress dot com
    04-23-2014 04:05 PM
  23. praegler's Avatar
    I have an unlocked AT&T Galaxsy S4. I am on T-mobile and the phone works, but I either get 4g-LTE or Edge. I did the research and found that the AWS Bands that T-Mobile uses for it's HSPA (3G) are disabled on the SGH-I337 AT&T S4. A little more searching and I found the web site: How to Enable T-Mobile HSPA+ AWS Bands on AT&T Galaxy S4 SGH-i337/SGH-i337M! | GalaxyS4Root.com

    I have followed the instruction on the site (with the exception that I had to use *#0808# instead of *#7284#), but when I get to the the part where you recover the 337_AWS.qcn, I get the error "Received an invalid command from the phone"

    Has anyone else gotten this error when trying to enable the AWS Bands on your AT&T phone and how did you get past the error?
    06-10-2014 08:24 AM

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